its got street ported heads , intake ported some too , roller rockers . pretty mild cam ,few other tricks in the engine too. got an 850 cfm proffesionally built quadrajet on top. running 3:31 gears in a 12 bolt rear that came out of a 70-72 chevelle. the guy i had build the engine got his wifes 77 ta into the 12.90'* with this exact engine combo. so when i take it to the track this summer i would hope for mid to low 13 seconds in the quarter. maybe break into the 12'* if i get a hold of some slicks. lol