i bought a 71 cutlass wit a 307 and dont want that engine its too weak what should i replace it wit?

Answer 1

Chevy 350. Easy to build into a superengine, parts are everywhere, and they run forever as long as you take care of them.

Answer 2

I think your best bet would to put a well built 350 small block, if your looking for speed. Yes a 455 will have a lot of power, but GM bigblocks do not like rpm's, and putting a bigblock in something that you want to go fast or race, while still driving it every day, would just not be resonable. The chevrolet small block is VERY reliable, and cheep/ easy to do. If you build the 350 right, than you should have a car capable of doing low 13 to high 12 in the quarter, while you still could drive the car home.

Answer 3

The Olds has what's called a BOP (Buick, Oldsmobile, Potiac) bellhousing on the transmission. you will ought to apply an GM (not Chevy) engine like the Buick or Olds 350. The 307 is a 2nd era block from Oldsmobile. the 2nd era of Oldsmobile V8s became into made out of 1964 via 1990. maximum of those engines have been very comparable, using the comparable bore centers, in spite of the reality that "massive-block" variations have been produced with a 10.625 in deck height quite than 9.33 in . All gen-2 small-block Olds V8s used a stroke of three.385 in, and all yet one massive-block used a stroke of four.25 in. All 260, 307, and a super kind of 350 Olds engines used aluminum intake manifolds (instead of forged iron) to shed some pounds. the gentle aluminum manifolds have been infamous for leaking coolant on the outer corners after the engine had around seventy 5,000 miles. This situation became into brought about by using the differential thermal growth quotes between the aluminum intake manifold and the forged iron block/heads assembly, inflicting the seal on the intake manifold gasket to fail. on the 350s, many Olds mechanics replaced the aluminum intake with the older forged iron intakes to clean up the leak situation. You best best would be to locate an Olds 350, have it rebuilt and placed it in you Cutlass. this would be greater low fee than paying for a Chevy 350, plus a Chevy transmission and adapter. to not point accessible are alot of oem performacne areas for the Olds 350s accessible incuding intakes, heads, exhaust, cams, etc. good success!

Answer 4

A 350. A 455 would weigh a ton, need different mounts, require a different transmission, get about 2mpg and make the car handle like a pig.

Answer 5

455

Answer 6

Buy a blue printed crate engine and pop it in there:
MARSHALL Part # BP3837CTF {BLUEPRINT Performance Engine}
Dressed 383 Alum/ Forged/ FI; 440HP; 460 lbs. Torque; 4 Bolt Main Block; SCAT forged crankshaft; DART Aluminum cylinder heads; HOWELL Multi-Port fuel injection system

Answer 7

455 is best. what are you going to do with the 307 though?

Answer 8

455 if u have doh..a 350 chevy is easy and cheap if you dont

Answer 9

a 350 will bolt right in.