I have a '64 ElCamino with a tall spipndle disc upgrade. The track is increased 3/8 of an inch outboard - each side. I want to put 16x7 ralleys in front. 65elcamino (member) suggests 17x7 with 4.5.

I suspect that I would subtract the wheel track from the 4.5 back space yeilding 4 1/8 back space. Am I figuring this corrctly? Just want to make sure before ordering the wheels. -thanks