For a big-block MOPAR, the HIT-282-NC is a hydraulic lifter grind with 282 degrees advertised duration on both intake and exhaust. Lobe lift is .3000", providing .450" gross valve lift with the standard 1.5:1 ratio rocker arms. The duration at .050" is 226 degrees on both intake and exhaust. lobe separation is 114 degrees. Timing at .050" is: intake opens 4 degrees BTDC, intake closes 42 degrees ABDC, exhaust opens 52 degrees BBDC, exhaust closes 6 degrees BTDC. Regards, Chase