X-heads vs J-heads: what's the difference??
this can be done to any small block head..X J U or magnum head
there are benefits if the porting is done correctly...there are huge losses
if you get greedy in the wrong areas..
this can be done to any small block head..X J U or magnum head
there are benefits if the porting is done correctly...there are huge losses
if you get greedy in the wrong areas..
1970 #3418915 ~ '340 T/A' Cylinder Head
Push-Rod Template Bore Guide
