340 on dyno video, whats your opinion

Probably a voodoo 268 and that combo is a 340-350hp max combo. Lots of happy numbers especially from a builder that used to be on this site.

Intake is an Air Gap.

Heads didn't look worked over at all from the quick shot. If they had some clean up porting, then 370 is possible. No chance with a factory X/J head is that thing making more than a true, track MPH observed 350hp. My 2 cents and worth less than you paid! LOL