Chevy 305 in 80 Olds Cutlass?

Question

Gentlemen:I've thought about putting my old Nova's 305 in a Cutlass (1980). Will itfit and, if so, any special mods I will need to make?Jack.

noname · Accepted Answer

What motor did it come with?

Lee Richardson · Answer

307 or 350 Olds would make a nicer, easier swap.

Tero Huikko · Answer

1979 might have had the dual bolt pattern TH-350 because it was the last year of Olds starfire was manufactured. Its V8 version had Chevrolet built 305 and TH-350. This also made possible to get almost any Olds with 305 as a dealer option. At 1980 this wasn't possible anymore and it's not likely to own a 1980 Th-350 with dual pattern.

Anyway I would give an effort to replace 260 with some "nickel free" 305. If you want it light get a late model Olds 307 with roller cam and a _good_ carburetor. If you want it to grunt get an Olds 455 and machanic double pumper carb. It will fit very easily even with A/C. In the 455 case you might want to change the front coil springs to heavy duty springs too ;)

-TH

formatting link

If you have that type of setup, you can go with

eightupman · Answer

Very true on the 455.  but be careful..you have to run STOCK valve covers orthey will not clear the AC.  My dad had that problem when he stuffed a 455in a 1986 Cutlass.  As far as the springs go, you can get a pair from aCutlass Salon (or 442/Hurst Olds) with the FE-3 Sport Suspension and itshould hold things up nicely.  I do not remember if my dad changed thesprings on his car or not...it was a V-6 from the factory

Chevy 305 in 80 Olds Cutlass?

Join the Discussion

Didn't find your answer?