I was under the impression that the deck height with a LS VTEC would be to short for a Ls crank rods and gsr pistons. Your best bet is to use B16a2 pistons or ctr pistons. The b16a2 (00 Si) will net you 11.3-11.5, with a ls crank and rods, the numbers go to 11.5-11.7 due to the better throw.