Welcome Crow. Everything said here about the 4200 is true-but it's your choice there is no right or wrong way to go. I agree with Hank, get the parts hot tanked and cleaned first before deciding what to do and what to keep. Throw away the cam. A stock replacement is only $70 but you still could easly do better. Can you please measure how far down in the hole the piston sits at TDC ? Can you als measure how deep the dish is on the stock piston? Thanks in advance Jay 6155