Timing gears are two to one, crank has to rotate twice around for cam gear to go once.
If you hit the spot where the noise is at, can you back it up and and make it go away? Stay at the spot, don't keep going all the way around.
How was your cam lubed, and is it a new one? You need to be careful turning the engine a bunch of times with a new camshaft, you sure don't want to wipe all your break-in lube off. I suggest backing the rockers off till you find the problem, them apply more cam lube and then the rockers. A used cam will take the rotation with only extra lube applied.
Engines are really tough, you would have to drop one pretty hard to bend a crank or something serious. I would bet is sheet metal, could the oil pickup tube move with a good jolt?
Joe
