Greg,
I am not as familiar with the GMC's, but does your engine have more than a standard amount of head studs?
Second thing. Correct me if I am wrong guy's. Doesn't the GMC use the same timing set a 235/261/250/292? If So 12Bolt has adjustable timing sets in stock. Oh wait, I see you want STEEL cam gear also. Those are in the works.
Yes, there are 2 more studs in between the 2 and 3 and 4 and 5. They did not help , the head was dancing it's a$$ off. This motor has been setting since 2005 or 2006 and was probably built before 2000.
