Quote: What's amazing is that you saw 500 hp with iron heads. We haven't gotten that from 906s even with bigger engines that have larger cams. Perhaps that pocket porting was better than you thought.
you want to be more amazed , check out the 383 in member fast68plymouth , Dwayne Porter/Porter Racing Heads ... hows 500HP with NON PORTED 906's (ok they are NHRA STOCK LEGAL)it's a 383 , maybe punched out to .060 ??? , the numbers wit hthe stock intake and carb where fairly impressive also .
