Can a 307 be swapped into a 1986 cutlass supreme v8 350 engine????

Asked by Oct 13, 2016 at 11:07 PM about the 1986 Oldsmobile Cutlass Supreme

Question type: Maintenance & Repair

I am in need of a new motor...the junkyard does
not carry a 350 at the moment but they said a 307
will fit and just add all other parts from old motor
and will fit perfectly...will it work is it worth it??

4 Answers

21,165

Same block, same stroke, just a smaller bore. You can swap over manifold, heads, accessories. You'd be giving up some horsepower obviously. Try expanding search radius if you want to hold out for an Olds 350.

3,715

An Olds 350 will not fit without modifications. If you want a 350 it needs to be a Chevy 350 same as the one that's in it now. If this car is just transportation the 305 is fine. Check which side the dipstick is on. If its opposite from your 350 you will want to get the exhaust manifolds with it as well.

21,165

We're talking about an Olds 307 swapped in for an Olds 350 in an 86 Olds Cutlass.

3,715

By '86 all GM 307s were small block Chevys. I'm a little fuzzy about whether a 350 in an Olds would be an actual Olds engine or not, but you could be right on that point. They'll be pretty few and far between though.

Your Answer

Add photo

Related Questions

Cutlass Supreme

Looking for a Used Cutlass Supreme in your area?

CarGurus has 110 nationwide Cutlass Supreme listings and the tools to find you a great deal.

ZIP:

Search Oldsmobile Cutlass Supreme Questions

Oldsmobile Cutlass Supreme Experts

#1 munron
munron
Reputation 640
#2 tennisshoes
tennisshoes
Reputation 390
#3 Tom Demyan
Tom Demyan
Reputation 340
View All

Related Models For Sale

Used Chevrolet Monte Carlo
7 Great Deals out of 1,503 listings starting at $2,000
Used Buick Regal
107 Great Deals out of 10,474 listings starting at $1,995
Used Chevrolet Caprice
165 listings starting at $13,998
Used Chevrolet Impala
652 Great Deals out of 31,512 listings starting at $1,300
Used Chevrolet Camaro
215 Great Deals out of 36,428 listings starting at $1,250
Used Ford Mustang
317 Great Deals out of 43,882 listings starting at $2,000
Used Pontiac Grand Prix
31 Great Deals out of 3,312 listings starting at $950
Used Dodge Charger
284 Great Deals out of 28,289 listings starting at $1,997
Used Cadillac DeVille
6 Great Deals out of 1,839 listings starting at $1,777
Used Chevrolet Corvette
144 Great Deals out of 20,320 listings starting at $3,995
Used Pontiac Firebird
6 Great Deals out of 783 listings starting at $2,000
Used Pontiac Bonneville
3 Great Deals out of 590 listings starting at $1,599