i see, i'de reccomend at least a 1/4" gap. caliper bracket don't flex that much, well they shouldn't. you could grind a hair off it and run your truck down the road and check the rim for any signs of rubbing. i would get to crazy with the grinder.
yeah you defintaly arent supposed to put 15 inch wheels on a NBS truck. but you should put a small 1/4 inch wheel spacer on and you can grind it down a little. I did that on my old truck because for my first set of wheels i was too cheap to buy new ones.
i ground the shit outta my fbody calipers along with tons of other people to fit 15's with no problems. It dosnt look youd need to grind much imo. Id do it. calipers aint that much anyway if you decide you shouldnt have.
just becasue you can doens't mean you should. Take a look at a 73-87 caliper, esp a d60 caliper. id bet theres seriously 3x the metal on a d60 caliper than that flemsy thing. I wouldn't touch those, period. It only assists in stopping your truck...
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