Backspacing on a Super

[oasis]

I understand the differences between backspacing and offset. Unfortunately, I do not currently have a 1302 or 1303 yet to do some measuring. I have a potential wheel deal -- which I know is putting the cart in front of the horse, so to speak -- and I'm trying to figure if these wheels are worth getting. (I'm not interested in flipping them on eBay although the thought crossed my mind.)

Does anyone know what the max backspacing (the mounting surface to interior edge measurement of the wheel) there is on a Beetle/Super Beetle for rear wheels?

Same question, but for the front wheels of a Super (1302 and/or 1303) while assuming TopLine MaXX struts, Kerscher struts or some other similar struts are being used.

From there, I can figure the wheel's width, offset and any spacers (if necessary) that might be needed with each wheel being considered.