Two things I remembered. First, the SD Pontiac required a specail cam when used with the SBC head becasue the valves are ordered differently, but this is possible. Second, one of my buddies needed a deck plate for an oddball tractor engine and gave BHJ a gasket and some specs and thay made a plate for about 800 bucks. That plate could be used to drill the block and align the heads when reassembled for welding and then used to hone the block. It would be an effort and cost a few for the first one, but after that it could be pretty affordable. Lots of things involved I guess, but that makes it more worth the doing.
