N42 is the block Im going to,use for,my stroker after reading all the posts on here. Supposedly much stronger and I have 2 laying around so if the shop messes up I get a second try.
As for adding more cam: more cam,means you can, in theory, get away with more compression on pump gas. And keep,in mind the L series is not like a v8. You have to rev it out to make power.