1966 4Door Cutlass Suprrme Hard Top
March 3rd, 2019 | 11:04 PM
#1
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Joined: Mar 2019
Posts: 142
From: Eure, North Carolina
1966 4Door Cutlass Suprrme Hard Top
My new Baby
Hello Oldsmobile Owners.🤔 I just purchased a ‘66 4 door cutlass supreme with a 425 Ultra High Compression engine 2 days ago. Oh! My name is Danny. My friends just use D. Any way is good with me. I live in NE North Carolina... (back to the car) I traveled 1200 miles round trip to get it, not knowing really what I was getting, besides the photos I had, and a little information. The car was purchased new but this person’s mother way back then, and they kept it in the garage most of the time. It only has 68,000 miles on it and no major rust in the pans (floors-rear trunk). I got up this morning with intentions of cleaning it up a little bit and just seeing what I have. The battery was dead so I jumped it out... Vroom! Vroom! It fired right up. It had been sitting a long time. Bad gas and all, it runs!!! I have a lot of work to do and just joined this forum today, but I am looking forward to this project... I will entertain any advise, and technical support you guys/gals can offer.
Last edited by MuchNeededAdvice; March 3rd, 2019 at 11:06 PM. Reason: Misspelled word
March 4th, 2019 | 01:52 AM
#2
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Joined: Jul 2018
Posts: 3,498
From: Chesapeake, VA
Cingrats on your purchase😀 Lemme be the first to welcome you to the group. This place has a wealth of info and everyone is great about jumping in with advice, tips and "been there, done that."
BTW, where in NE NC do you call home?
Dave
BTW, where in NE NC do you call home?
Dave
March 4th, 2019 | 04:37 AM
#4
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Joined: Mar 2019
Posts: 142
From: Eure, North Carolina
I live in Gates County North Carolina. The man I got the car from is around 80 years+... All I have at this point is to go with a mans word, and he seemed to be a good guy. The car came from Cedartown Ga. The research I have been doing shows that motor as an option in the 88’s and another vehicle,so maybe they had a special order or something. All I know is we will find out with more research (bend numbers- motor codes) etc... Thanks for the welcome
March 4th, 2019 | 06:14 AM
#5
Old(s) Fart
Joined: Mar 2007
Posts: 48,377
From: Northern VA
Welcome. Be aware that the 425 was never installed in the Cutlass line, so if that really is a 425, someone swapped it in there. The 1966 Supreme was only offered with the 330 motor. 1966 was the first year for the Supreme nameplate, and it was only available in a four door hardtop (Holiday Sedan in Oldsmo-speak) that year. Good luck with it.
March 4th, 2019 | 09:44 AM
#7
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Joined: Mar 2019
Posts: 142
From: Eure, North Carolina
Ok here’s the scoop...According to the vin #’s, it is an Oldsmobile with. Cutlass Supreme V8.It is a Holiday 4Door Sedan. Was manufactured in 1966, in Lansing Michigan, and was# 430270 in production...I have yet to get the motor numbers but I’m a bet it is a 425.
March 4th, 2019 | 05:34 PM
#10
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Joined: Mar 2019
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From: Eure, North Carolina
Ok so I found the #4 on the heads. Seems the old fellow may have been wishing he had a 425. If I was betting on this,I would have lost big time... Anyways a 330 doesn’t slow me down any, because I am still stoked on the car. The two speed transmission might leave me wanting another gear once I get it on the road. He did contact me today and the title process is in the works. North Carolina from what I am reading, can be a booger to work with DMV and classic cars. Thanks for the information, and I look forward to more input as I go on.😁👍
March 6th, 2019 | 06:28 AM
#11
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Joined: Oct 2005
Posts: 7,115
From: NJ
I believe a 66 330 should have #3 heads originally. Number 4 heads were on the 67's. Not going to say "I told you so" on the 425 so I wont...lol. If you post a picture of the trim tag on the firewall we can see build date.
March 6th, 2019 | 06:56 AM
#12
Old(s) Fart
Joined: Mar 2007
Posts: 48,377
From: Northern VA
This wouldn't be the first time that someone claimed that a small block Olds was a big block...
The two speed Jetaway (which has nothing in common with a Powerglide) does have the switch pitch torque converter. A TH350 is nearly a bolt-in and is a popular swap.
The two speed Jetaway (which has nothing in common with a Powerglide) does have the switch pitch torque converter. A TH350 is nearly a bolt-in and is a popular swap.
March 6th, 2019 | 08:21 AM
#13
Running On Empty
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Posts: 20,597
From: Earth
March 6th, 2019 | 12:24 PM
#14
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Joined: Jul 2009
Posts: 3,141
From: Dallas-Fort Worth
Another way to tell is to look down around where the oil fill tube goes into the block there's numbers:ID/ Casting
Code Year(s) CID Number Notes
A '65 425 381917?? 1st year, big cars.
386525
D '66 - '67 425 389244 Big-car engine. Toro is different internally.
If it is one of these, like the rest said its a transplant..
Code Year(s) CID Number Notes
A '65 425 381917?? 1st year, big cars.
386525
D '66 - '67 425 389244 Big-car engine. Toro is different internally.
If it is one of these, like the rest said its a transplant..
March 6th, 2019 | 12:28 PM
#15
Old(s) Fart
Joined: Mar 2007
Posts: 48,377
From: Northern VA
Another way to tell is to look down around where the oil fill tube goes into the block there's numbers:ID/ Casting
Code Year(s) CID Number Notes
A '65 425 381917?? 1st year, big cars.
386525
D '66 - '67 425 389244 Big-car engine. Toro is different internally.
If it is one of these, like the rest said its a transplant..
Code Year(s) CID Number Notes
A '65 425 381917?? 1st year, big cars.
386525
D '66 - '67 425 389244 Big-car engine. Toro is different internally.
If it is one of these, like the rest said its a transplant..
(Hint: 381917 is a 330 block, not a 425)
March 6th, 2019 | 02:58 PM
#17
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Joined: Mar 2019
Posts: 142
From: Eure, North Carolina
So here’s the trim plate... Getting down to the numbers on the block is going to be a booger right now, until I get it jacked up.The weather is bad here. Rain every weekend, and the breaks don’t work. I think the booster is trying to pump up but the master cylinder needs a rebuild kit...I think I will enjoy working on this fine piece of equipment. Something that doesn’t need a computer programmer to service for a change... A couple of things I have found: The heat works great, but the fan only works on high speed. The voltage regulator stays engaged when I cut it off, until I disconnect the battery and connect it back...Last time this car had tags on it was around 2000. Thanks for the input and advice.
March 6th, 2019 | 04:09 PM
#26
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Posts: 20,597
From: Earth
March 6th, 2019 | 04:23 PM
#28
Running On Empty
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Posts: 20,597
From: Earth
March 6th, 2019 | 04:25 PM
#29
Running On Empty
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Posts: 20,597
From: Earth
March 6th, 2019 | 05:31 PM
#34
Thread Starter
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Joined: Mar 2019
Posts: 142
From: Eure, North Carolina
OMG!!! Information Overload! I know more now about this Oldsmobile than any other vehicle I have ever owned. So now I spend my breaks at work and at home, checking to see who has schooled me more on my new found classic. Thanks 🤔😁
