Did a sample mount up tonight for the '72 LeChampion gravel rider. This is the clincher set, but still might go with a tubular / cross. Or.... this clincher but will go tubeless and experiment with much lower pressures and hopefully no more snake bites.

Mavic clincher 3/4" width
36 spoke straight gauge, Campagnolo Record hubs
Thai made Vittoria Cross XN Pro 700 x 32c
(install measure width 28 mm x height of sidewall 27 mm )
min./max 60-85 psi
Total assembly weight incl. wheel/ tube / tire
front: 1344 gm / approx 3 lbs
rear: 1827 gm (with 5 speed cog) / approx 4 lbs