I have an "87 el Camino. I am using a set of old rally wheels 15x7 with a 4 1/4 backspacing. Had to add another 1/4" spacer to use 255x60x15 tires. I would like to upgrade to rear disk brakes and 18" wheels. Can I use modern OEM Camaro wheels? What spacer should be used? Tire size?
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