I revisited this old post to add my information.
Did some of my own backspacing measuring on my Hall billet wheels that I think fit nicely on the stock body cars.
The Hall wheels 17X11 Rear have a 6" backspace this is measured from mounting flange to back lip of rim where tire seats(inner flange)
The 17X8 front wheels have a 5" back space
These wheels have a nice look and dont rub on my stock 71 pushbutton also had them on 73 with Willwood disk brakes front and rear and Hall aluminum upper and lower A arms front and rear with no rubbing but the fenders were rolled. I think they might of stuck out about a 1/4 to 1/2" more due to the aftermarket brake hats and adjustable A arms
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