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

35,205

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.

4,855

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.

35,205

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

4,855

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

Cutlass Supreme

Looking for a Used Cutlass Supreme in your area?

CarGurus has 75 nationwide Cutlass Supreme listings and the tools to find you a great deal.

ZIP:

Oldsmobile Cutlass Supreme Experts

  • #1
    munron
    Reputation
    710
  • #2
    tennisshoes
    Reputation
    430
  • #3
    Tom Demyan
    Reputation
    350
View All

Related Models For Sale

Used Chevrolet Monte Carlo
3 Great Deals out of 937 listings starting at $3,900
Used Oldsmobile 442
60 listings
Used Buick Regal
82 Great Deals out of 4,088 listings starting at $3,995
Used Chevrolet Camaro
224 Great Deals out of 28,922 listings starting at $3,900
Used Chevrolet Impala
397 Great Deals out of 25,595 listings starting at $799
Used Chevrolet Caprice
126 listings starting at $1,350
Used Ford Mustang
270 Great Deals out of 37,082 listings starting at $2,150
Used Dodge Charger
242 Great Deals out of 32,689 listings starting at $1,800

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.