Just replaced cam and lifters in this machine. Does anyone have the spec on camshaft lift at the valve? I assembled motor using Comp Cam assembly lube on the cam lobes and lifters. I used Comp Cams additive for engine break in. I pre-lubed the motor as specified in the shop manual. It started and ran fine holding 2200 rpm’s per cam mfg. after about a minute it flattened out and started popping and back firing. Gas fouled the plugs. I pulled the valve cover and it looks like all 4 valves are only opening about 3/16”.