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1970 cutlass supreme or 1971 cutlass supreme

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Old May 26th, 2016, 11:49 AM
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1970 cutlass supreme or 1971 cutlass supreme

hi guys have a question to ask. I have had a 1971 cutlass for a while now its a column shift and have been looking to do a floor shift conversion. I came a across a 1970 car which I was going to use for parts has complete interior in good shape and a posi I needed. I bought the car but looking at it its fairly complete. I guess my question would be should I restore the 1970 car or gut it and restore my 71? are both cars worth the same? any input would be appreciated thank you in advance.
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Old May 26th, 2016, 11:56 AM
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I'm partial to the '70 version as it is different than the '71 and '72 which are essentially the same except for the grill and minor interior things. '70 was much more unique and was also the first year of the body style.
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Old May 26th, 2016, 12:01 PM
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I, too, am partial to the 70, probably because that's what I have. What sort of shape is the 70 in, and what would it take to restore it? If it's truly a parts car you should probably part it for what you want, but if it's a running, driving car it would be ashame to take it apart. Heck if it were me I'd restore the 70 then have both.
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Old May 26th, 2016, 12:12 PM
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the 70 is in over all good shape it starts don't know yet how well it runs. but it is complete like I said. only real bad thing about it is it had vinyl top so the roof looks really rusted. the 71 has a great body but bad interior. I like the 71 looks a lot meaner from the front end. still thinking about it ...... thanks for the input guys!
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Old May 26th, 2016, 01:27 PM
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If the 70's roof is rusty than the 71 is the better bet. You don't want to cut a roof on the weld it to the other.
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Old May 26th, 2016, 01:36 PM
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Pictures would help. The roof rust is it rusted threw anywhere?
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Old May 26th, 2016, 06:05 PM
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Originally Posted by T.Wong
hi guys have a question to ask. I have had a 1971 cutlass for a while now its a column shift and have been looking to do a floor shift conversion. I came a across a 1970 car which I was going to use for parts has complete interior in good shape and a posi I needed. I bought the car but looking at it its fairly complete. I guess my question would be should I restore the 1970 car or gut it and restore my 71? are both cars worth the same? any input would be appreciated thank you in advance.
If you are planning to change the interior configuration and the 70 has the parts? I'd go with restoring the 71. Another reason I'd choose the 71 over the 70 is the rear differential and axles. 70 is an O type rear and gears for that are like finding hens teeth. The 71 has a 10 bolt corporate and carriers/gears are plentiful.

Other than the rear axles, the cars are pretty much equal IMO. The console cars are cooler. What body styles are the cars? Are they 4257 or 3677/87?
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Old May 26th, 2016, 08:43 PM
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as far as i can tell its just badly rusted not through though just bought the 70 yesterday. havent really peeled all the vinyl to check yet. i will post pics tomorrow. the 71 has interior from something else dont really know and its bench. other than that its in decent shape needs body work of course but minor. have a 455 and turbo 400 ready to rebuild just thinking which way i should go. thanks for the input guys really appreciate everyone that took the time to answer. will post some pic tomorrow to see what u guys think.
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Old May 26th, 2016, 08:45 PM
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im not sure what body they are i think its the 4257? the 3677/87 is Canadian right?
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Old May 26th, 2016, 09:06 PM
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Originally Posted by T.Wong
im not sure what body they are i think its the 4257? the 3677/87 is Canadian right?
Now that's funny!

Model 4257 is the Cutlass Supreme Holiday Coupe



Body Style 4257 - Cutlass Supreme


Model 3677 is the Cutlass Sport Coupe aka Post coupe



Body Style 3677 - note: framed door and quarter windows

Model 3687 is the Cutlass S Holiday Coupe



Body Style 3687 - note: no frame around side window glass
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Old May 26th, 2016, 10:14 PM
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[9QUOTE=Allan R;923100]Now that's funny!

Model 4257 is the Cutlass Supreme Holiday Coupe



Body Style 4257 - Cutlass Supreme


Model 3677 is the Cutlass Sport Coupe aka Post coupe



Body Style 3677 - note: framed door and quarter windows

Model 3687 is the Cutlass S Holiday Coupe



Body Style 3687 - note: no frame around side window glass[/QUOTE]

Thats what happens when u try and google something lol. Thanks for the info learned alot. Total newb with oldsmobile. 4257
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Old May 27th, 2016, 03:55 AM
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I agree on several points, but would go with the 70. Of course, I am a bit biased....

Last edited by 70sdream; May 27th, 2016 at 05:47 AM.
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Old May 27th, 2016, 05:21 AM
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Fixing or replacing interior parts is less expensive and easier than fixing rusted-out body panels. I'm sure almost everyone on here will agree that you need to start with the most rust free car available.
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Old May 27th, 2016, 07:19 AM
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Originally Posted by oldspackrat
Fixing or replacing interior parts is less expensive and easier than fixing rusted-out body panels. I'm sure almost everyone on here will agree that you need to start with the most rust free car available.
I also would go with the 70 if the roof isn't rusted threw in a major way. I do agree the car with less rust is the right choice.
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Old May 27th, 2016, 11:28 AM
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Unfortunately only the 3677/87 roof panels are reproduced now. You might be able to get a good replacement from a boneyard. I looked at DVAP and they have (2) 1972 CS hardtops that would be suitable; nothing in the 70/71 years though. Note: 70-72 CS Hardtops are identical roof skins.

Just an FYI for you about the Cutlass Supreme. The standard seat for them was the A51 Strato Bucket seats, with the option to change to A65 Split bench seat with fold down armrest at no extra cost. There are no records of how many were produced with each. Having the A51 option didn't automatically give you the D55 center console though. If you have the A65 interior, you likely also have a cloth seat with naughahyde trim and piping.
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Old May 27th, 2016, 10:31 PM
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Old May 27th, 2016, 10:33 PM
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blue 70 / white 71
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Old May 28th, 2016, 12:22 PM
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Hard to tell from looking at the pics which is in better shape. The 70 vinyl looks really bad, and that Chevy steering wheel just misses the mark by a long shot. It does have the desirable bucket/console interior though. The aftermarket mirrors don't look right IMO. Lots of work to fix it up. Are those the original colors?

The 71 is missing most of the side trim that's on the 70 and the body appears to be in somewhat better shape. It does have 72 eggcrate grills which means the rad support is likely changed from the 71. 72 grills needed to have the rad support changed to fit as they are more forward than the 71 grills. Who knows, the whole front clip may be changed. The interior is Sienna, which makes me wonder if this car wasn't Bittersweet paint color in the first place. Heavily customized interior. The OEM stereo tape player is a nice option - it needs 10 ohm speakers to work properly.

Both cars are AC, so if you decide to restore just one, there's hopefully a good supply of donor parts from the other.

Are they both drivers?
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Old May 28th, 2016, 12:49 PM
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Originally Posted by Allan R
Hard to tell from looking at the pics which is in better shape. The 70 vinyl looks really bad, and that Chevy steering wheel just misses the mark by a long shot. It does have the desirable bucket/console interior though. The aftermarket mirrors don't look right IMO. Lots of work to fix it up. Are those the original colors?

The 71 is missing most of the side trim that's on the 70 and the body appears to be in somewhat better shape. It does have 72 eggcrate grills which means the rad support is likely changed from the 71. 72 grills needed to have the rad support changed to fit as they are more forward than the 71 grills. Who knows, the whole front clip may be changed. The interior is Sienna, which makes me wonder if this car wasn't Bittersweet paint color in the first place. Heavily customized interior. The OEM stereo tape player is a nice option - it needs 10 ohm speakers to work properly.

Both cars are AC, so if you decide to restore just one, there's hopefully a good supply of donor parts from the other.

Are they both drivers?
71 up and running 72 havent work on yet starts up but havent moved yet. Barely going to pick it up in next few days. Both have 350 with turbo 350 but do have a 455 ready to rebuild with a turbo 400 ......Wow u really know your olds man. Appreciate your info really do.
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