I did a search before I posted this thread and I just did it again incase I missed something. But I can't find anything that says you HAVE to retune your PCIII after putting a HC Piston and Cam. I know it would be make more power than without. I guess I'm asking will it run too lean if I don't?
That was a major problem for me. What I did to solve it was buy a wideband sensor. You could also check with rocket factory because they could get you one although you would probably have to pay for it. Around $70 maybe. And the best you could do is take it to a dyno shop.