15 x 7 Welds with BFG 235/60/15 Traction T/A's or Drag Radials on the rear. Removed the rear horizontal shocks to alleviate slight rubbing on them. Tires clear the fender lip at the top of the tire by the width of 2 of my fingers, now (I have big fingers). Don't have any experience with 255's.
No engine in the car when this was taken.

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88GT, paint: 2003 Porsche Lapis Blue Pearl Metallic,
Calif. factory MAF, new 302 long block, heavily ported stock heads & intake, 70mm TB, 73mm C&L MAF, E303 cam, no pollution equip. exc. O
2 sensors, equal shorty hdrs, Magnaflows, new W/C T-5, TriAx shifter, K Cobra clutch, alum. driveshaft, BBK springs, new stock brakes, 3 row rad, 180 deg, 2-sp. el. fan, Hotchkiss Rear C-arms
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dyno: 258hp+327rwt with ported E7s!!!!!