Cam Duration Vs. Usable/Used RPM Range

32310,sweet here. Ran a aggressive 242/252 circle track cam(lobes widened to 112) Crower lobes. (396 Chev rat)A heavy car,with a tight converter(3680 lbs.,tight Darrell Young 2800 stall,4:10's ,out back). The shift points 6000,recovery at 4300. Same cam,square ports: same damn thing. The shift recovery, is what counts here. (Add an 8082 Dominator, couldn't keep the tires from spinning). Hope this helps,lol.