249-35-518-8Xtreme Energy XE274HR Hydraulic Roller Camshaft Only Lift: .555''/.565'' Duration: 274°/282° RPM Range: 2200-6200 *Note: Firing Order 1-3-7-2-6-5-4-8 2500-stall converter, 3.55-3.73 gears, better cylinder heads, intake and fuel system. Operating Range:2200-6200 RPMDuration Advertised:274° Intake / 282° ExhaustDuration @ .050'' Lift:224° Intake / 232° ExhaustValve Lift w/1.6 Rockers:.555'' Intake / .565'' ExhaustLobe Separation Angle:112° I think it will be a big step up form my E cam. I have World Sr heads and 10.5 to 1 comp ratiop 3.80 gears. I will pick up some matching springs. What do you gear heads think