Mean 318...or stroker....hmmm

i would question easy to to get 400 horsepower out of a 318.
It would take a high revving 318 to make that number and would likely be a poor performer
on the street.
I also dsagree with this. A decent compression ratio, I'd use the KB slugs at zero deck, good flowing heads, Edelbrocks OOTB port is GTG for that, headers, cheapies work here, and a typical street cam at about 230 @ .050 will do it. It may take the next gear ratio up to perform best, but these things are known and excepted. IMO, an OD would be excellent tpo use.