First step, well, the first after removing the recalcitrant Phil BB from the Trek 620 frame from @
steine13, is to find out what headset will fit. Measuring indicates I have 40mm of stack height to work with, so now I get to look for headsets hiding in the garage that might do the trick. I think I have a Tange Levin NIB out there and perhaps a couple of others. No hurry on this. I still need to strip and sand the frame and treat it for rust before throwing any parts at it.