A 451 pump gas engine with Trick Flow heads will run 9.90's in a 3100 lb car if everything is working right so that combo is way, way off somewhere.

Fast is correct, get the engine on a known good dyno to sort it out. If the engine is all apart then look it over for clues. Maybe the Dominators were set up wrong and the engine was going down the track at 9:1 air fuel ratio? Maybe the firing order was switched up? If it was my engine I'd get rid of the sheet metal intake and the carbs and put a single 4bbl on there. I bet it goes faster and works better.

Also sounds like the drivetrain might not match the engine. I know Mazzolini used to run a 383 with B1 heads and he shifted at the moon. Just crazy RPM with those big heads on a smaller engine.