Hello everybody I had my cam go flat in my sbc. it was a crane cam 100072, 480 lift 228 duration hydraulic flat tappet. I'm wanting to go with a hydraulic roller cam and lifters. What would be a good cam. I'm looking at a howards retro fit is that a good cam. the engine is a 1975 4 bolt main block, gm 906 vortec heads, scorpion roller rockers etc.