it makes fuck all difference in what block you use unless u longstud in that case itll need to be 200 because the waist is thicker so will take the longstud

there has been a few in the early days on 205 blocks at or just above 500 bhp that were reliable asmost 500 bhp engines but i would change the head bolts about every 5k because the yb is a floating head and lifts and moves about under high boost levels