small block differences. someone want to fill me in please?

The builder said it really looks good. That crank in a 318 will net you around 350 cubes. A good size. Match that with a set of good light pistons and your on the road to a 340/360 killer.

lol...not unless you've got twice as much money in that 318 or your spraying...people yank out 318's and replace them with 340/360's for a reason...