Thanks 52pu for the cam specs and also to Joe H. for the screwdriver method of locating TDC. I just finished degreeing my cam and I came up with 205 degrees of duration @ 0.050" which is within 1 degree of the spec 52pu gave me. The 1 degree difference may be within the error of my measurement technique. I would like to advance the timing by 4 degrees using an offset key on the camshaft keyway. In which direction should the offset key be pointing? When looking at the front end of camshaft should the offset be to the right or the left? From 52pu's post I am not sure if I need a 2 or 4 degree offset key.
While I was measuring things on the engine I decided to check the cam gear run-out and I found it to be 0.015" which is 0.011" outside of the spec. From looking at the cam-gear/cam-shaft mating surface I could see it was not pressed on straight. Hopefully when I get the offset key put on I will be able to press this gear on straight this time.


1954 GMC 1/2-ton Longbed
1971 Pontiac LeMans Sport