86 Black Roller 318, swap/interchange into 72 318

400 at flywheel, less is fine aswell with what is around. 360 would be nice but people are asking to much for those lately. Would like a 360 crank to cram into either 318. performer intake and holley 650 with 1 inch spacer. Rockers on 86 are blown through aswell aswell head leak.
it's an old trope, and it's mos def long in the tooth around here, but you can almost make 400 with a 360 falling out of bed. with a 318 you're gonna need really good heads, compression and a lot of cam for the cubes. and even then it'll be just there at 400. but not with that intake and a 650.

set your goals at a more reasonable level, say 300~325 and you're more likely to achieve them.

all the parts and machine work you'd need to splash for on a 318 to make that power, if applied to a 360 would go much, much further.

it sounds like you've got a live dog with that roller motor. massage that into something decent and save your coin for something else.