Thanks all. Kind of what I was thinking. Fun to learn stuff, but that opens up other cans of worms. Sometimes ignorance is bliss. Actually bike was up in stand with wheel and RD off. String around headtube to rear dropouts. Just a slight variance to one side. Spacer added which brought that side out which should have kept the centerline of the wheel the same as it was. Not real precise, but was reassuring to see it looking as it should. Now to set up the slightly less vintage RD to handle the 28 tooth freewheel. Still will be 5 speed vintage, but hopefully better shifting than the campy Gran Sport. Vintage is nice, and I have read posts of others having luck with the Gran Sport, but I haven’t.