Custom backspacing?

[AustinClassic]

Do most wheel companies make wheels in a large variety of backspacing?

I'm running a C4 rear suspension in my '56 Belair. The rear is mini-tubbed so I know I can fit a 20x12 and a 335 rear tire but I might be limited on my wheel choice.

If not, I can have the half shafts shortened etc but would like to avoid doing that if possible.



Thanks