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

rabius - You can put a 360 crank into a 318 (buy turning the mains down as you mentioned). All sb mopars use the same rod length and small and big end sizes, just the weight and strength vary.

The question would be is why? If you are budget minded, build up a 360, You already have a long stroke and a long rod. and would make more power than trying to fit this stuff in a 318 block.