I ran a JT-b on my car for a short time. I don't know the exact HP. Dyno at TSS wasn't reading numbers that day, but I'm guessing it was making mid 800s. My best pass before the transmission grenaded was 9.5 @ 144. The next pass my transmission was done. I think the car had some low 9s in it.
my setup:
stock sleeves (with water jacket supports), weisco pistons, manley rods
20% underdrive ati balancer
3.15 pulley (20psi @ 7200rpm)
fore dual pump setup on e85
ID1000