Well, two months later and I have made some progress. For those following this I did get the hubs laced to the Mavic tubular rims, put some Tressostar red cloth tape on the handlebars and installed the brake cables. I had a Campagnolo axle lying around that seems to work with the bottom bracket issue involving the thicker non French Tange fixed cup that somewhat buggered up the shell on the drive side with and will be using it with a Nervar Star crank set for now until I find a period Stronglight 49D.
My understanding is that Nervar is ISO as is the Campagnolo axle so they should work together. I needed a shorter length that has a 50mm distance between the axle races so I hope it does the job. I may replace the MKS Sylvan pedals with some Lyotard 460D pedals and only need to get some shifter cable and housing, shifter, the shifter boss mount repaired and the front suicide Simplex shifter needs a clamping band so slowly but surely.
The frame is a 57 cm with a 55 cm top tube and I currently am using an 80mm Pivo stem but because of the slack angle of the seat tube, I am guessing probably at least 71 degrees while the head tube is 73 puts me further back than any of my more modern bikes which are all 73 parallel so I will most likely need a shorter stem to feel comfortable, I do notice I am more stretched out! How this bike will ride and feel is another story of course, I favor wider tires these days but since it will be for occasional leisure rides it will not be a real problem. Tires are typical 21mm tubulars. I think setting up the rear derailleur will be "fun", more so with the spring that tensions against the main body, seems to be a bit tricky so far.