MY 72 DART IS A 20 OVER 360 BUT IT IS CLARANCED AND BALANCED WITH CAST J HEADS PORTED I'M RUNING A SOLID ROLER CAM 13.5 COMP. MSD IGN. ELECT W/PUMP NO ALT. 2 BATT. IN TRUNK. 750 PRO FORM CARB. ON ELDO. AIR GAP 904 TRANS 8IN. 5000. STALL CONV. AND 488 GEARS WITH STK SUPN SPRING MOVED IN FOR TIRES 31X10.5X15 M/T SLICKS I RUN 6.9 IN 1/8 0N MOTOR AT 100.9 MPH THATS 10.8 IN 1/4 SAVE MONEY MAYBE A 360 IV'E GONE 6.40 ON A 150 SHOT. GOOD LUCK GARY:cheers: