318 Build suggestions

People build 400-500+Hp NA LS 5.3l all the time and even do 400+ NA LS 4.8l

build a 318 like you would a 340 it’s just got to spin slightly higher need a bit more gear and stall.

It all comes down to cylinder heads and right cam carb intake exhaust cr to support it, displacement will decide what rpm you’ll make power.