Going Racing!

That engine should make at least 700 hp. If it doesn’t there is something wrong.
9.60’s in the 1/4 off the trailer

i agree with that. My W5 did, and the numbers backed up at the track..140@ 3220… At that point it was a hair over 14 to 1, 1 7/8 TTI header, Victor W2, 727, 5400 vert. 1100 dominator.
These heads should be a bit better than W5’s. Bigger valve, more cross section.
But you cant race Dyno’s… real test is at the track.
We have no idea what the cam is on this motor, couldn't tell what carb was used either.
At 3100 pounds, those heads “ should” be able to go 142 or so on gas, maybe even a hair better, but that’s really optimizing the combo to its capabilities, little things like gas porting, ring pack, etc, etc really help ring up the numbers at the track.