I doubt if you could go this fast @ 3800-3900#? with much less than 1000 Dyno hp. There is talk of close to 9000rpm. What would that take? SS/AH style valve train. Biggest bore possible. If I was a betting guy I’d say 4.600x3.500. The plenty of time developing the intake and cam. Can’t even imagine the amount of time, effort and cost of this build. Congrats to Rick, Dave and their team. Us mortals still need light parts and headers.
Doug