I was planning to add a stroker setup, new heads, manifold, etc. to either the 318 or the 400. The main challenges with the 400 are a) fitting it into the doghousing of the A108 and b) getting it to mate with the correct transmission. I've priced out the stroker/upgrades for both and they are about the same. Buying a 360/408 crate is a bit more expensive (and probably not as fun since I don't get to build it!)
