First Mopar Build 360/422 CID
That engine looks great. I had a sixpack AAR engine in my 70 dart.Don't worry about HP.the sixpack will do the job if tuned right.My car ran better with the sixpack and street tires on and off the track.Slicks are a differant subject.Good luck with it and come back and tell how the engine sounds when the two outer carbs open. Mark