Just for comparison, had a Chevy 540 on the dyno today and it made 920 hp. Very similar engine to the 540 Mopar. This BBC is also all aluminum, similar compression, similar cam specs, single 4 bbl intake using the same 1050 dyno carb, both were wet sump with vacuum pump, both used dyno headers, both use Jesel belt drive, crank trigger with MSD, etc. The BBC heads are just that much better. This engine uses Brodix Big Brodie 3x heads. I think they are 365 cc with a big rectangular intake port. The intake port is so big it requires a special gasket and you have to buy the Brodix intake if want it to fit out of the box.