big block/small block

given the choices, another vote for the 360. And I agree that those gears are too much. 3.56 gears will get you down the road and not kill you with the 3,000+ rpm drone and bad gas mileage on the freeway.

Before you yank the 318, do some research on ways to pep it up. There are a number of things you can do to increase its power without spending the money on a new motor.