I have a 1992 ford f350 with the 7.3 non-turbo diesel. A shop in TX did me a big favor and left my fuel pump loose on the side of the motor and they did not fix the timing correctly. So I spun two bearings. I just put a crank kit in it. But I am having trouble bringing the cam around so I can set the timing. It is real stiff both ways. I realize the valve springs are pretty tough on this motor but there has to be a way to turn it without the crank gear attached. The problem I had in TX was the fuel injection pump went bad and I took the tower off to change it. I regret ever doing that I never got the timing back in line after that. The shop I sent it to had all the timing except the fuel injection pump right. They left the fuel injection pump 180 degrees out it ran but totally like crap. I managed to nurse it home but then did not realize the motor was leaking so bad and lost most of my oil then spun the bearings.