Has anybody heard the rumours that the mid to late 80's BBC are somewhat notorious for destroying cams, sometimes even during break in right after initial fire up? And is there any truth to this? I have a 87 454 block and cast crank, forged flat top pistons, static compreeion is about 10.0/1 and I am running 69 063 closed chamber heads, I had the cam custom ground, its .588/.588 lift solid flat tappet w/ 274 duration @ .050 and has 107* lobe seperation, its supposrd to be producing 560-570 hp with just shy of 500 ft./lbs, of torque. I built the motor 2yrs ago and had a clutch explosion at the dragstrip with around 1500 miles on the motor that saw the motor hit the rev limiter( thank god ) it consequently crushed the top of 2 valve guides and put it out of commision for the last couple of years. Because of the combination I had to shop around for the closed chamber heads w/ same casting numbers. The bottom end was never dissassembled, I just fired the motor last week, it ran strong and hard for the first couple of days, but I am concerned about the possibility that the cam has gone flat on me, or if the loss of power is due to ignition, ( I am running an msd 6al with pro=billet distributer) the carb has been a problem child from day one. I am hoping somebody can stere mr in the right direction, and tell me how to be certain the cam will live, k