Motor made 505 peak hp & 535 peak tq on Lingenfelter’s dyno 5 years ago when I built it. Lingenfelter did the heads & spec’d the Hyd Roller.
Two years ago, the truck ran a 13.20 @ 105 mph on ET Street Radials , but the clutch was slipping. It previously ran 13.48 @ 109mph with the 'Vette wheels & Nittos. I put in a new SPEC hybrid street clutch last summer, but never raced it. I just finished updating to Gen 7 DFI with sequential port & updated ignition system. Have yet to dyno or race it. It was off the road for the last year because I lost interest in it (I’ve had it 15 years & lost interest before). Planning on getting it tuned soon & making some passes.
After putting the new clutch/new aluminum flywheel in last year, it made 362 wheel hp on Hybrid’s dyno at 9.8 a/f ratio. This is why I upgraded the EFI system. The PC interface went bad & I couldn’t make any changes to the ECM. I am hoping for around 410 - 420 hp at the wheels & high 12s in the 1/4.