In 1970 the side mouldings are pot metal. 1971 the side mouldings are chrome. The side mouldings were dropped after 1971 & the rockers received a chrome metal cap. Option your Supreme convertible with the W-29 package & that chrome cap goes away.

 

70 and 71 are the same, certain parts are pot metal and others Staineless steel. Same parts both years.

 

To further clarify, the 70 and 71 parts are the same, except for the molding behind the door and ahead of the rear wheel. In 70, the molding is made up of two pieces, one part stainless and the other a small pot metal piece that slides in the stainless part. Why anyone would design a potentially simple one piece part into two pieces made up of two different metals is one for the mystery books. In 71 they made it into a one piece pot metal part as they should have originally done. I would love to hear the story on this one. In summary, all 71 Supreme 2 doors are pot metal with the exception of the front fender below the Cutlass script and the door molding which are stainless.

 

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Went to the Lansing Homecoming over the weekend and the Go Shop 72 Cutlass Wagon was there. Had a notebook binder in it with pictures of the Supremacy convertible in color but missing the 71 rocker molding and SX emblems. Also a different white SX convertible with Jack Troxell presiding at the 76 Sport Nationals. I verified Supremacy car and 76 Gator Nationals SX was a different car via phone with non other than Jack Troxell.




Above: Al Seger in the Go Shop Supremacy convertible.



Below: SUPREMACY CONVERTIBLE?

Above is what I assume to be the Supremacy convertible or why would
it be in the binder? The car has a roll bar, SX emblems, and sport mirrors
A Brian Young was killed in this car September 14,1986.
This car held the standing 1/4 mile record at 11.99 @ 104.6 mph.
I assume Al Seger set this record? Rusty Patterson sold the
Go Shop wagon and all accessories like this notebook full of Al Seger memorabilia
so current owner does not know anything about the white convertible. So I guess the above
photo settles the history and mystery of this car until more info comes along.
















Below : Jack Troxell in a different Cutlass
SX convertible in 1976. He built both cars and I verified over the phone
with Jack Troxell Supremacy convertible and 76 Gator Nationals SX are different cars. But the dark colored Lubik Olds convertible
is the same as the Supremacy convertible.

 

Where did you get the information that there were 454 L33s made that didn't have the Y79 option (sx) and could you send me a copy.

 

I have production figures by option by series by month for 1970. Through June, there were 7122 SXs made. There were 852 W32s that had to be SX cars. There were 6724 L33 Supremes. That means 852 + 6724 = 7576 engines that went into Supremes of which there were only 7122 SXs, so there were 454 more L33s that had to have gone into non-SX Supremes.

 

Thanks W Machine

I was curious because I have a 70 Cutlass Supreme convertible L33 without the SX option and have never seen another one.

I would imagine a few were turned into SXs over the years.

 

One of the main reasons there were not many that were not an SX is that basically if you were getting the L33, the SX package only cost $10.53 more.

Since the beginning of this thread, we put together the SX story on Wild About Cars:
http://wildaboutcarsonline.com/cgi-b...aldisplayed=50

Wild About Cars. http://wildaboutcars.com. An information supersource, especially Oldsmobile. More Olds content than anywhere else on the internet and continuing to grow.
You'll find Chassis Service Manuals, Product Information Manuals (AKA Assembly Manuals), Inspector's Manuals, and other documents that will contain this and much much more.
Dealer Brochures, magazine ads and articles, and the Automotive History Preservation Society library growing daily.
Free to join, free to learn.

 

Thanks Kurt

Wild about cars is a amazing website thanks for telling me about it.

That was a good article you wrote. The SX is Olds best kept secret.
Everyone knows what a 442 is but a SX is a different story.

I registered with the site and looking forward to checking it out as i have a variety of cars and this website will cover them all.

Cheers
Wayne

 

Interested to know if any L31 455s made it into non SX 1971 Supremes.

if 454 could have been in 70 cars what about 71 cars.

 

The only way to get a 455 in a Supreme in 71 was with the SX package.

Don W

 

how about In 1971, could engine code L32 be ordered, the 455 V-8 with 320hp, 8.5:1 compression and 460-lbs.ft. of torque at 2,800 rpm.

If so maybe i should chk this 71 - owner says it has the original 455. it has no rear bumper cutouts or sx emblem fender holes.

I will chk the vin derivative and chk for an OD trans - anything else ?

 

Check for big block fender braces that attach in the holes just ahead of the hood hinges on hardtop models. There should also be braces attached to the front bolts of the lower control arms that connect to the upper control arms at the crossmember frame section. Certainly check the VIN on the dash to the engine and OD TH400.
Maybe the fenders were replaced due to rust and the bumper due to an accident. My 442 didn't have a notched bumper due to an accident. No one has ever heard of a 455 in a 71 Cutlass Supreme without the Y79 SX option.

 

For 71, engine code L32 was the only engine available with the SX. It was a 455 - 4bbl. The L32 engine was also available in the Vista Cruiser. These were your only two ways to get a 455 in the Cutlass series besides the 442 which came standard with a 455.

​​​​​​​Don W

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