Well my friend hooked up a 50 shot to his b16a2 and burnt a valve and three seats. So he is having the head redone and the guy is gonna go 1/2 mm over w/ the valves along w/ a three angle valve job. What should he expect from this?? that is all he has done to it other than nitrous, no cams. How much would he gain w/ cams and hondata??