I'm trying to remember, but I'm guessing factory block or Hamilton block (if there are any around any more). Flux Injectors. Wondering if he is using a Hamilton head as well. He started a thread on here when he first hit 3000 it might have detailed what he was doing.
Josh McCormick I know for sure runs a factory block that's deck plated and has made around 2800 last year at ucc.
I know the some of the pulling world and some of drag racing guys are using billet block and are making multiple runs/pulls on them, but are they fulling standing up to hype? I'm genuinely asking and not thinking one way or the other.