It finally finished after a long struggle with getting parts.
Dart/Buick 10* heads by Nickens Brothers
Comp custom 3/4 nitrous cam
Intake by Induction Specialties
Built by Steve Ashworth Race Engines
CP pistons, Carrilo Super H beams, Kings Crank
600rwhp at 8500rpm on motor (nitrous tune 545)
823rwhp at 8500rpm on a 180shot. Yep 280 on a 180shot 73jet!!!
Dyno pull to 9000rpm all numbers sae 95* ambient temp