y8 block z6 head. dished pistons will give you an even lower compression so that you can run more boost. correct me if im wrong ppl. ive never done it but try a stroker kit too
a stroker kit lol....
you dont need a stroker kit....maybe new rods, pistons, head studs, bearings...
to the OP..... depends on how much hp your wanting......and if your gonna build the internals of the motor or not......
stock b and h series can handle around 300whp..... stock d series can handle around 220whp.....now by the time you pay for the a b or h swap you can just build a d series motor and push around 350whp on pump gas....so i say
Built D > B or H swap