70 Cutlass Supreme w/ 455, TH400 The car has been repainted and the emblems are not there. I had a co-worker tell me about a guy at work selling a cutlass. I got in contact with the seller and what are the odds. His dad had showed me this car 30 yrs ago. It was a gold color at the time. His dad passed away 2 yrs ago and he's wanting to sell the car. Is there any other way to validate its an sx other than build sheet? It does have the braces from the lower control arms. 12 bolt rear end. The car was assembled at the Fremont CA plant. Any ideas on where the build sheet might be. Thanks

 

I found my build sheet on top of the gas tank. 70 442 Fremont built unit. I was surprised to see mine was a W-25 customer ordered car too. Good luck!

 

Paint Code 58 A is Burnished Gold Poly (58) with a white (A) convertible top. Frankly I think that would look better than the current color combo.


RPO L33 455 was available in the Supreme in 1970 without the SX package. Does the block VIN derivative match the car's VIN?

 

I'm not an expert with the SX by any means. But have you checked the engine vin derivative to be sure its the original engine to the car yet? Do you need some help finding that? I've found build sheets from two different Fremont cars on top of the gas tanks. There's several other potential locations, but if its had some work done to it this might be one place that wasn't disturbed yet. John

 

Looks like you guys both type faster than I do

 

That's what you get for being three hours behind.


The build sheet is the only way to prove the car is an SX, since the 455 was available without the SX package.

 

That's what I thought Joe. We shall see soon if everything goes right. Thanks

 

You might want to check inside the trunk on the body line, or look inside the ventilation jamb to see if there's evidence of piercings from the SX body moldings. Same at the front fenders. If you find the build sheet look for RPO Y79. That's the guarantee it's an SX. Looking at the pictures, it's not that easy to say, it looks more like a standard 70 CS that has a 455/400
I'm a bit surprised that it has such a low Body number given it's production date at Fisher Body Works Freemont.

 

chk the TH400 for code OD and chk the rear-end code for the 2:56;
also if it still has the original 2 barrel carb it is an SX specific stamp.
Like already stated the RPO L33 455 could have been ordered without the SX Y79 package, either way the hood is not correct and has been changed and it does not have the SX full body large trim.

 

I don't see the Y79 option on the build sheet either, seems like it would be there if was an SX. You still have a great power train though. I miss my SX from over 40 years ago now. Also I have never seen that hood on a '70 Supreme. I think they were used on the S model. If other panels were changed though, you would not find the filled holes of the SX emblems.

 

Not according to the 1970 product brochure...

 

The data tags shows 05A as the build date, by then the 2bbl was history, and only 4bbls were available.

 

I know it's an older thread, but I am new to the forum and just came across this. My question to you is, what sign at all leans this towards being an SX? I don't see one single thing that indicates that it could possibly be an SX at all.

 

Dude, I would totally smash some 70s secretaries!

 

The Supreme has a different hood than an "S" or 442. There is a chrome windsplit in the middle, of a Supreme hood.

 

Well I finally was able to make a deal on the car. It is a #s matching 455, turbo 400 w/ O-D tag. Was able to get the trunk open that had some parts in a box. Found what was left of the build sheet. It does show the Y79 on the sheet bottom right. Vin at the top right of build sheet.
The drivers fender does have the holes for the sx emblem. The passenger side has filler in the holes.

 

Wow, that's as close to not being there as I've ever seen. But it does match up with the engine and trans.

 

Ahh, just looked at the first pic's and saw where the build sheet was found. Very nice score!

 

Tell me about it. Mice and roaches about ruined it for me.

 

Yup. There's no doubt about it, That is a documented SX.

 

Post a clearer image of the left side of that build sheet please.

 

Alan I was throwing the box of shredded paper and dead mouse & noticed what looked to be part of a build sheet. Took a closer look so glad I did.

 

 

You got your Y79, you got your VIN, and they match the motor and trans stampings. It doesn't get much better than that. The left side of the build sheet tells us some real good info also.

 

Clue me in a little of what you see.

 

Well, first you have your build date of May 7th, then you have your engine code TP, your trans code OD, and rear end code R2-6. Below that you have your trim code for your interior, your exterior color, your top color, and your original wheels that came on the car. Even though we know it's a Freemont built car, the mice ate the original destination dealers address right off the sheet.

 

Thanks Alan. Good info Time to get started on the restore.

 

First thing right off the bat is you need to source a correct hood and all the side chrome trim for a Supreme to include the wheel well mouldings in which the wrong ones are on the car now. Funny because the ones on the car now fit every other model except Supreme. The Supreme mouldings are unique to the Supreme only. And the front portion of the rear quarter mouldings (from the wheel opening to the door) have two different styles, Type 1 and Type 2. The later being on 71's which are one piece instead of two pieces. If you use the two piece moulding, be careful buying just the short corner piece as they have two versions of that piece alone, one is for 4 door cars and it is a little shorter than the one for the 2 door coupe.
Good luck with your project.
BTW, did you finally get it for a good price?

 

 

May build = 4bbl instead of 2bbl for February and earlier builds. Shown on the build sheet. Any evidence of it being a W32?

 

The evidence presented shows exactly what it is. How can you be asking about a W-32 when the build sheet clearly tells us what it is?

 

I did go back and see that it has the OD trans tag, so not a W32. The build sheet does not clearly show that. It shows Y79, and a 4bbl, no OD clearly on the sheet. Thanks for the arrogance.

 

note: I believe this is what Dan is referring to. Specifically the last paragraph which refers to the W32 engine.

 

I beg your pardon, but I'm not sure you are reading the right build sheet. The build sheet presented by 32redman for the car which is the subject of this thread, clearly shows the Transmission is an OD. It further clearly shows the the engine as being a Non- W32 455. I don't mean to be arrogant, but I am merely stating what is very clearly presented as a fact in front of us. No where does the original thread starter make any claim or show any indication that this car has AC either, but I can bet you it does have AC from reading that build sheet.

 

We all come humbly to this forum with incomplete knowledge and with a desire to learn more. Some of us are more informed than others, and we make mistakes. My opinion? Post 31 could have been worded a little better...

 

Another thing you should do is contact the SX registry and register it with them. You can find them at sx455.com.

 

Will do. Thanks

 

Not even close.

 

Really??????

Maybe this will help you see it more clearly.




Hope that helps.

 

Y'know, you've got a whole 42 posts on this forum, responding to some that have 6,000+ posts. Maybe you should spend a little more time earning your stripes rather than being the resident expert. The "OD" would not be clear to all, unless all had a comprehensive understanding of all possible transmission codes.