I have 245/50 16's on my pony rims on my 88 gt vert they dont rub and look better than the skinny 225 good luck
I strongly recommend the nitto drag radial for the rear
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88 mustang gt convertible BBk equal length headers mac cold air intake cowl hood nitto drag radials ford racing clutch flow masters h-pipe 180 degree thermostat 16 degrees of timing