[joe_padavano]

Originally Posted by J-(Chicago)

Since the 3.8 was a buick motor, will an Olds small block bolt right into it's place? Buick--->Olds?

What about the opposite.... could you swap a 307 out of an 86 cutlass with a buick 350 from a 72 Skylark? Olds---->Buick?

I'm aware that the fuel pump and lines will prob. be on the wrong sides, but would there be any other issues?

Is a Buick block deeper? Resulting in a driveshaft lengthening or shortening? Or manifold/starter problems?
I have also heard that when building up and racing a buick motor it will always starve the driver's side of oil. Is this nonsense or crappy stock pumps or what?

Buick motors have finished 2nd place in the enginemasters competition for a couple years, even beat Dick Miller's build I think? They can't be all that bad right?

First, the only thing in common between the Buick and Olds motors is the bellhousing bolt pattern. The motor and frame mounts are different. The size ("deepness"???) of the block has no impact on the driveshaft length - it's the trans length and location that matters. Assuming the car in question had both Buick and Olds motors as options, the trans will be in the same location for either motor.