I have a 1975 Omega,with a 260.I was wondering what if any four barrel intake will fit?I know that this engine isn't really a performer but I want to get rid of the quadrajet two barrel.Any help would be appreciated.
Thanks for the help
Mark

 

I have learned that there are not ANY manifolds that will fit the head port profile of a 260 motor. They will bolt up, but the ports will not line up. You would have to look at just upgrading to a Holley 2bbl ($259) to try and get the performance you are looking for.

Honestly, you wont get much out of a 260.

John

 

Get an intake from an Olds 350 - and leave the 350 attached to it!

 

I had to laugh at that one!

Seriously, that isn't a bad idea.

 

I was trying to be nice... but that is pretty much what I would have said.

John

 

If you must keep the 260, you can probably use another set of heads, don't know what ones, and an intake to match. But at that point, you may as well just put in another motor. Unfortunately, 260's are not very perfomance orientated, and there isn't anything that I'm aware of that is made to work on the 260. The good thing about oldsmobile is that all motors mount into any sb or bb mount. Just that I don't know how much power the trans and rear can take. A mild or even stock 350 would be great.

 

Good point, since 1975 was right around the time GM started to replace 8.5" rears with the 7.5" units and some TH350s with TH200s. If the Omega in question has the TH350 tranny and 8.5" rear end, it should be able to handle some decent power - a hell of a lot more than any 260 can dish out (sorry to jump on the 260-bashing bandwagon, but everything that's been said about it is true)! If it has the 7.5" rear and/or TH200 tranny . . . well, a healthy in-line six could probably blow 'em up.

- GoldOlds

 

Thanks for the help guys,I appreciate all the responses.I really don't want to make a race car out of the Omega,I just want a cruiser.I have 2 other X bodies-a '77 Nova with a Big Block Chevy-a '75 Pontiac Ventura with a 388 Stroker small block.So for right now I would like to have a dependable cruiser with good gas mileage and I really want to keep it Olds powered,and probably upgrading to a 350 Olds later.So thanks again.......Mark

 

Hey now, The 260 has more potential than a boat anchor. I believe I had one in my 82 cutlass. It was a 400 dollar car that is still running today with about 197000 on it. Bone stock. I gave it to my buddy's dad (a retired mechanic) for a project car to mess with some years back. It's in Yuma Tennessee at the moment towing trailers of hay for a cattle ranch.

 

The Edelbrock Oldsmobile SP2P manifold fits the 260 perfectly



you can see that the triangular ports of the SP2P intake fit inside the 260 intake gasket

 

Good info but 13 years too late for the original poster.

 

That is good info to file away. This may be the only useful application for that goofy SP2P intake.

 

Actually on a truck it is also good. I used it with a Qjet and 5A heads(also good on a truck)on a 76 350 in my 78 1/2 ton. Part throttle was amazing, full throttle, not so much. The Qjet overwhelmed it, too much air and fuel. I also had it on my 94 Z71, moved the motor from my 78, with the 500ish cfm TBI. It was perfect and out performed the A4 I replaced it with, very strong down low and OK up to the 4200 rpm shift points.

 

I always wondered this....20 years into Oldsmobile and learning somethin' new. haha. I don't like the 260 but for some purist who wants to take 30 pounds off the front end...I guess this may be the trick.

 

More important than the 30 lbs is the fact that this may be the only 4bbl intake that you can bolt to those pathetic 260 heads and not have a massive port mismatch.

 

That 76 442 with the 5 spd needs this intake. I think a Vin Y 307 Canadian non CCC Qjet carb with the limited secondary opening would be perfect. They have a super lean idle calibration and the secondary air door like the American CCC carbs has limited opening. Just add a screw in plug and slot the APT to fine tune part throttle, it would give a touch more pep. Just grind off the SP2P and Edelbrock. Just say it was a 442 only option along with the 5 spd. With this 4 bbl, 3.55 gears and dual exhaust, it might almost keep up with a modern sub compact base model with 4 severely obese passengers. Guys have used this intake to bring their 260 cars from dangerously slow to just acceptable with no loss in mileage.

 

Need to add a stroker crank from cutlassfi too

 

At that point, you would need some of this also: