Got an almost complete 78 550 for cheap with a ceased engine. I have done top ends on single cylinders before but nothing like this. Where my engine ceased I can remove one bolt off the cam gear. The other bolt is almost out but gets wedged up against the head. I can not seem to get enough slack with the chain to get it off the gear. Does anybody have a good tip or trick for me. Once I get the chain off I am on my way. thanks