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Looking for a 350 olds motor..I'm in South Texas..
I found a 79 for $200 but I don't know if it's a good motor to build .btw not hot rodding want reliable..it's going in a fwd car.. so tranny can't handle a lot . I got 2 307 motors.. would it be cost affective to fix them up .ones been in the weather .other is in the car bolted up.. I was told it's good but he lied and said it's a 350 also.. arsehole
I'm in Texas any help or advice would be great .I got 2 307s. Which they scammed me thinking they were 350s.. I found a 350 for 200$ but it's a 1977-79..
A Cruiser but loud exhaust and choppy idle.. got a Edelbrock intake now.. there a 403 for 300 in Austin or the guy in San Antonio will deliver the 350 for $200.. saves gas money and time.. but 3A heads I heard are horrible.. trying to get 9to1 comp or more
Last edited by jimmy361713; April 5th, 2024 at 10:12 PM.
A cruiser with 9:1 compression makes sense, but then you throw in a choppy idle that doesn’t make sense for a cruiser and 9:1 compression. I recommend you decide if you want a cruiser that runs well and is fun to drive, or a poser that sounds bitchin while idling but runs like poo and is not fun to drive.
I have a complete 67 330 that has been completely machined. Bored .030, Lunati cam and lifters, balanced, #4 heads rebuilt. Needs to be assembled. Shorty headers. standard transmission crank, flywheel or flexplate, your choice. With Edelbrok OL4B intake with Q-jet. I have over $4000 in receipts, $2500 and you pick it up in Red Oak Texas. Just South of Dallas on I35E. Would be good for Toro or G body..
Last edited by edzolz; April 5th, 2024 at 09:06 PM.
I have a complete 67 330 that has been completely machined. Bored .030, Lunati cam and lifters, balanced, #4 heads rebuilt. Needs to be assembled. Shorty headers. standard transmission crank, flywheel or flexplate, your choice. With Edelbrok OL4B intake with Q-jet. I have over $4000 in receipts, $2500 and you pick it up in Red Oak Texas. Just South of Dallas on I35E. Would be good for Toro or G body..
Thanks but I'm trying to build a mild motor with my dad .
A cruiser with 9:1 compression makes sense, but then you throw in a choppy idle that doesn’t make sense for a cruiser and 9:1 compression. I recommend you decide if you want a cruiser that runs well and is fun to drive, or a poser that sounds bitchin while idling but runs like poo and is not fun to drive.
Yeah, I have never understood the choppy idle thing, unless it can back it up big time in performance. The 403 is a good choice, KB 6cc hyper pistons and cam swap would get you there. The 350 might be OK but would need the 3A heads checked for cracks. A guy on the G body site had a set cracked so bad, it looked like fault line under the valve cover.
Is this going in a front wheel drive Eldorado?
If so, you may need a Toronado oil pan to clear the front axle.
Yea i bought a parts car that had a motor which the guy lied and said it was a 350..(its a 307).. I didn't know to check the numbers first..but needed the parts anyways like the oil pan the starter the brackets which are like finding dinosaur bones or even a live one 😂.. the manifolds which I have a extra set.. the front drive axel ECT..
I have a complete 67 330 that has been completely machined. Bored .030, Lunati cam and lifters, balanced, #4 heads rebuilt. Needs to be assembled. Shorty headers. standard transmission crank, flywheel or flexplate, your choice. With Edelbrok OL4B intake with Q-jet. I have over $4000 in receipts, $2500 and you pick it up in Red Oak Texas. Just South of Dallas on I35E. Would be good for Toro or G body..
What you mean standard crank .it's never been cut? I got a Edelbrock intake .newer model and can't use headers in my eldorado I think .no room.. unless someone has done it before?
You got me thinking because your crank is a forged crank.. and by the time I'll get a crank and heads and pistons ill be over budget.. pm me maybe we can work something out since I don't need the intake or headers(unless the headers will fit)
Has anyone did a 80s eldorado swap with a olds motor?
Could use advice and guidance to what works and what doesn't.. I know this is a olds forum but there's gotta be some knowledge to this here .id think .
The 1979-85 Eldos were available with an Olds 307 and an Olds 350 diesel, so this should be a bolt-in with the right parts. The problem is that the TH325 three speed and Th325-4L four speed automatics are based on the TH200 internals and are not that strong. No, the earlier TH425 won't fit.
The 1979-85 Eldos were available with an Olds 307 and an Olds 350 diesel, so this should be a bolt-in with the right parts. The problem is that the TH325 three speed and Th325-4L four speed automatics are based on the TH200 internals and are not that strong. No, the earlier TH425 won't fit.
Yea I know that's why I'm trying to stay under 300hp
I was gonna build a motor ground up but I'm looking into other options due to fighting for custody.. a guy Ed has a 330 that needs to be put together for 2500.. but I don't know if shorty headers will fit so i asked to work out a deal without them and without the intake.. as i have one
There are no headers that fit the FWD configuration. There are headers for the GMC motorhome but these do not fit the Toro/Eldo chassis.
Thanks for clearing that up .so I hope hel make a better deal without headers or intake if not on the lookout or thinking about freshing the 307 up or if it fires up and runs I'll run it till it dies 😂 then will have to pull it out again..but by then I'll have some money saved..
There are no headers that fit the FWD configuration. There are headers for the GMC motorhome but these do not fit the Toro/Eldo chassis.
Do the 79 motor which are "windowed" really matter if your not building it for high horse power? Most ill do is put a cam after I put the intake? It's only $200 delivered.. to my home .that's cheap! It's got 3A heads though
I've never heard that the windowed mains make any difference unless you are racing or building serious HP. The 403 had windowed mains and was used to move the Custom Cruiser. I'm not sure about SBO heads to say if those 3A heads are desirable. Why don't you build the 307 that you have?
I've never heard that the windowed mains make any difference unless you are racing or building serious HP. The 403 had windowed mains and was used to move the Custom Cruiser. I'm not sure about SBO heads to say if those 3A heads are desirable. Why don't you build the 307 that you have?
X2. The windows only matter if you are building high HP and running high RPMs. The reduced stiffness and strength in the main webs can cause cap walk, which damages bearings and can also lead to the block coming apart. This will never be an issue on a mild street motor. An Eldo isn't a drag car.
i have done this swap a few times ,you might have an issue with the flexplate(flywheel) if you use a 330,the rear wheel drive flywheeel is different than front wheel drive.if your eldo had the ht4100 you will neeed accessory brackets and oil pan/pick-up.i have exhaust manifolds from a 5.7 diesel for the front wheel drive if you need them
i have done this swap a few times ,you might have an issue with the flexplate(flywheel) if you use a 330,the rear wheel drive flywheeel is different than front wheel drive.if your eldo had the ht4100 you will neeed accessory brackets and oil pan/pick-up.i have exhaust manifolds from a 5.7 diesel for the front wheel drive if you need them
Really good point! The TH325 and TH325-4L use a smaller diameter flexplate than do other Olds applications (including the TH425). This flexplate will bolt to any 1968-1990 Olds V8, but it will not bolt to the 330 crank due to the different crank flange bolt pattern. And as noted, the brackets and exhaust must be correct for the Olds motor. The HT4100 parts won't work.
i have done this swap a few times ,you might have an issue with the flexplate(flywheel) if you use a 330,the rear wheel drive flywheeel is different than front wheel drive.if your eldo had the ht4100 you will neeed accessory brackets and oil pan/pick-up.i have exhaust manifolds from a 5.7 diesel for the front wheel drive if you need them
Thanks a lot for the info on the 330!! And yes I have a parts car that came with a Oldsmobile motor so it has everything I need I also got a extra set and ex manifolds I bought on eBay..
I'd like to use the 307 but I don't think after putting a few hundred pounds of audio stuff and having 4 ppl riding it will be enough to move the car.. that's my concern..then I heard I'll have problems with the Edelbrock intake.. idk but the power and torque is a issue besides if the guy who sold it to me lied about it being a good 350 motor who knows what else is wrong . Im trying to go cheapest route . The 200$ 350 motor has heads and I hope when I did compression check itl be good . That way I can slap the intake and cam/lifters and itl be good . The 307s I'm sure id have to rebuild them and think I'd run into trouble needing a whole build of things to get it going.. I just don't trust the guy who sold it to me . But I did need all the fwd items I didn't have before anyone who knows fwd swaps knows it's not as easy as putting a motor in.. there alota different parts that I didn't know about that I know now..
Really good point! The TH325 and TH325-4L use a smaller diameter flexplate than do other Olds applications (including the TH425). This flexplate will bolt to any 1968-1990 Olds V8, but it will not bolt to the 330 crank due to the different crank flange bolt pattern. And as noted, the brackets and exhaust must be correct for the Olds motor. The HT4100 parts won't work.
Yea I found that out the hard way .lol I had to hunt for parts with no luck for 2 years . Engine mounts where the hardest..when I found someone who did have them I was too late .then I finally found a whole car in Austin . Had 2 blow outs at night and cost me extra as the only tire person answering charged way extra to bring tires .I kick myself for not renting the trailer but my dad had a S10 and I didn't want him to mess something up so I rent a dolly . Huge mistake.. if I brought spare tires it would of been fine . Learning lesson I guess ..
Thoughts on the 3A heads.. it's not even gonna be for "Street" just need the extra power and torque to move the boat on highway and be able to get up and go if I need her to
All the "A' heads have restrictive exhaust ports and a small 1.5" exhaust valve. If they are crack free, with flat top pistons, you will be able to get 9 to 1 easily and will work along with it's windowed main block for what you want.
i've also installed a 455 olds engine in a 81 riviera diesel car and had a slight problem with the front drive small block oil pan hitting the crank,i gave this car to my father so the transmission held up for many years,i know it wouldn't have if i drove it regularly because it was a rocket ship
i've also installed a 455 olds engine in a 81 riviera diesel car and had a slight problem with the front drive small block oil pan hitting the crank,i gave this car to my father so the transmission held up for many years,i know it wouldn't have if i drove it regularly because it was a rocket ship
What you mean you had a problem..I'm scared the big block 455 will tear the transmission up.. yea imma be driving it alot
the 350 deisel front wheel drive oil pan must be too shallow in the front and the 455 crankshaft would hit it slightly,of course i didn't find this out until it was in and fired it up.it required a little hammer work for clearance
Really good point! The TH325 and TH325-4L use a smaller diameter flexplate than do other Olds applications (including the TH425). This flexplate will bolt to any 1968-1990 Olds V8, but it will not bolt to the 330 crank due to the different crank flange bolt pattern. And as noted, the brackets and exhaust must be correct for the Olds motor. The HT4100 parts won't work.
The guy trying to sale me the 330 is tagging you Joe or trying to or calling u out to tell me it's not true yet ur here with other telling me the 330 won't work.... What id have to drill the flywheel or get a custom 1 made? I guess that's what he's saying.. he got upset I told him that in a message too.. I'm sorry I just been screwed 2 times and 3 strikes im out.. got 4500 in a motor and parts car that was supposed to be 350s
The guy trying to sale me the 330 is tagging you Joe or trying to or calling u out to tell me it's not true yet ur here with other telling me the 330 won't work.... What id have to drill the flywheel or get a custom 1 made? I guess that's what he's saying.. he got upset I told him that in a message too.. I'm sorry I just been screwed 2 times and 3 strikes im out.. got 4500 in a motor and parts car that was supposed to be 350s
The 307 flexplate would need to be redrilled to fit the 330 crank then rebalanced to match the old 330 flexplate.
Hey guys I finally got ahold of the guy with the 68-70 350 with the OL4B intake and the 7 A heads it's not the 7A heads with a big A next to the 7 it's down lower subjective from the 7.
#1 The new Edelbrock intake I got vs the OL4B? Which is better and lower rise . (It's going in a 84 eldorado so hood clearance is a must)
#2 I heard the compression is 10.1?
#3 cam lifters to not be too powerful for the tranny but I want a lil lope..if possible
#4 it was a running motor that got swapped for a big block should I open it up or test compression and leak down?
Trying to stay low on budget as I got a 67 Chevelle as that id like to start restoring..
Thanks everyone..
4100 motor got 125hp so anything over 200hp will be a huge improvement.and I want it to be reliable for yrs to come.. until I have money saved up to do a rebuild on it to freshen it up .
Last edited by jimmy361713; April 12th, 2024 at 02:32 PM.
Interesting on the 3A heads. Those would have been 1967 heads, so this motor was assembled from parts. Those are decent heads also. I like the OL4B better than the Performer, but not as good as the Performer RPM. The RPM will be a little taller. I don't know that the downsized FWD cars have the same hood clearance problem as the early Toros. You will need to find the correct flexplate for a TH325 car with Olds motor, but that shouldn't be a problem, and that will bolt to any Olds 350 crank. The correct flexplate is available brand new under Pioneer P/N FRA146. There's at least one of those on ebay right now.
Yeah, I have never understood the choppy idle thing, unless it can back it up big time in performance. The 403 is a good choice, KB 6cc hyper pistons and cam swap would get you there. The 350 might be OK but would need the 3A heads checked for cracks. A guy on the G body site had a set cracked so bad, it looked like fault line under the valve cover.
I found a 68-70 motor with the 7a heads.. the A is subscript.. any info on that ..I asked questions in my other post but got no replies..I'm putting my 2711 intake as the OL4B intake is a tight fit with hei.. and I can sale it to get extra money.. my 4100 motor had 125hp for a 80s eldorado which is smaller then a big boat caddy.. but im going to be putting 100s of lbs of audio equipment so I wanted a little more HP and torque to move her on the highway if needed.. will be run on pump gas.. don't want a big cam or anything for racing I'd rather get the best fuel economy.. but still with dual exhaust I want it to sound like a strong V8.. I worded it wrong I don't want a choppy idle i just want to hear the deep v8 sound through the exhaust.. I'm sure the 68 350 with intake and cam will be a huge improvement over the 125hp 4100 motor that's junk..
I found a 68-70 motor with the 7a heads.. the A is subscript.. any info on that ..I asked questions in my other post but got no replies..I'm putting my 2711 intake as the OL4B intake is a tight fit with hei.. and I can sale it to get extra money.. my 4100 motor had 125hp for a 80s eldorado which is smaller then a big boat caddy.. but im going to be putting 100s of lbs of audio equipment so I wanted a little more HP and torque to move her on the highway if needed.. will be run on pump gas.. don't want a big cam or anything for racing I'd rather get the best fuel economy.. but still with dual exhaust I want it to sound like a strong V8.. I worded it wrong I don't want a choppy idle i just want to hear the deep v8 sound through the exhaust.. I'm sure the 68 350 with intake and cam will be a huge improvement over the 125hp 4100 motor that's junk..
First I have heard of the 3 with the small A heads, must be rare like the 5 with the small A heads. Those might be the ticket for 79 HO and 80 442 owners.
April 5th, 2024, 05:37 PM
