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

16,265

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.

3,495

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.

16,265

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

3,495

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 125 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 560
#2 tennisshoes
tennisshoes
Reputation 350
#3 Rog Oneal
Rog Oneal
Reputation 320
View All

Related Models For Sale

Used Chevrolet Monte Carlo
16 Great Deals out of 1,475 listings starting at $995
Used Buick Regal
198 Great Deals out of 10,624 listings starting at $2,195
Used Chevrolet Caprice
148 listings starting at $10,900
Used Chevrolet Impala
846 Great Deals out of 34,369 listings starting at $1,800
Used Chevrolet Camaro
621 Great Deals out of 38,657 listings starting at $2,995
Used Pontiac Grand Prix
14 Great Deals out of 3,212 listings starting at $1,995
Used Dodge Charger
496 Great Deals out of 27,801 listings starting at $2,343
Used Honda Accord
1,078 Great Deals out of 74,908 listings starting at $969
Used Ford Mustang
640 Great Deals out of 36,930 listings starting at $2,800