CHECK YOUR THREADING if you can. Do you have any spare cones from QR axles? 9mm? 10mm? Try threading them on by hand, and you'll know.

I've found that many bolt on wheels use English threading. And, almost all QR wheels use Metric threading.

I've done the conversion on two rear wheels for Fuji Ace bikes (24" & 650c). Invariably I also have to touch up the dishing. But, front would be easier.

Anyway, if you have English threading, then it usually means finding new axles, cones, spacers, lock nuts, and oil seals, with the oil seals being the tricky part to fit. QR axles tend to be cheap.

That would be the advantage of the double quick release kit that elcraft found, if it is 3/8 x 26.

If you already have 9mm metric, then the swap is quick and easy, and you can probably find skewers and axles at your local bike co-op.

Check E-Bay for your wheel wing nuts. There should be vintage ones from before 1970 or so. Perhaps new ones too.