Chr0m0ly.... yes we have the same year and frame size. I have 700 wheels with 700cX38 tires and they just clear by about 4mm just under the front fork crown. I don’t think I could squeeze a bigger tire on this 1983 720.
For some reason... even though I had the same size (24”) frame 1982 728... I was able to squeeze 700cX42 tires on there.. strange???