It may be a minor point ... but ... what will you do about the 216's two-acorn nut valve cover fasteners and vents that will blow oil everywhere and make a mess of the beautiful engine and engine bay?
I'll bet that Jerry would be capable of drilling and tapping a 216 head for the valve cover bolts and use a 235 valve cover on it. Compared to the rest of the machine work needed, that's a walk in the park.