One of my friends had a very light [ just under 3000 lbs with a 200 lb driver ]'68 Dart. He ran 10:50s and 60s at 124 mph.with a budget built 365 motor and 4:88 gears. The motor used KB 13:1 pistons, Eagle SIR rods, stock cast crank with internal balance, MP .590 cam, Crane rockers and my old well used Stage I street heads from Hughes. He ran the car on alky. I don't remember what the stall was in the converter. He shifted at 6600 as best I can remember and was pulling 7200 in the lights. This was at Gateway.