Thanks guys

Cab, it seems it peaked at 7250. It doesn't nose over hard after that but the rev limiter is set to 7650 due to driveshaft critical speed. (so pulled to limiter was about 400rpm past peak)

I could put a carbon driveshaft in it and test higher but doubt it would do anything but continue to gradually fall off. And..I think may be hard on the valvesprings and valvetrain overall if I push it to/through instability with a 2.25 steel valve.

Fwiw, the changes made were of course small but seemed to add up. When I ran it in initially and it threw belts I noticed a jump in power. Seeing that and the numbers now, I think a big part of the difference was the underdrive pulley.