reccomendations? 73 dart sport or 75 RR?

well if it is from a race only standpoint , then cut up the dart. the B Body is much heavier than the A body.

i am biased because i have a 77 charger se and the late B's are attractive to me LOL

it will be a street car also, i want 12s in the back, pretty much a mini tubbed car, with the pro street style scoop