My only concern would be with the new KB pistons and compression using the 509 cam. According to the KB website, a KB236 piston with unmodified open chamber heads (approx. 88-90CC) and 0.020" head gasket, compression will be approx. 10-10.5.
Thoughts...
That's going to be a problem unless you don't have a problem running race gas .
Hopefully you haven't wasted money on those pistons yet .
