Sugar Bear thanks for your thoughts.
I have not started disassembly yet, (waiting for factory manual), I have the manifolds off, gathering info and courage before I proceed on full head removal.
I do understand that the process of removing the chain from the cam gear and keeping tension on the chain is a delicate operation with no room for error.
I am at TDC at crank and cam. I still have my vacuum pump off of the block from prior work. Does the chain move a bit after it is taken off of the cam gear resulting in movement of the IP/vacuum pump gear? Or is the movement the result of slackening the chain tensioner, etc? (I am good at painting marks on parts for realignment at assembly.)
I will keep reading some of the great threads from a couple of years ago (where you pitched in) and keep getting my baseline knowledge up. (I have not had a head off of an OHC engine.)
Thanks again for your input, really appreciate it.