I was told they would fit by a couple guys, but that they would be very close, and you would need to eliminate all body roll, or they would rub. I went with 255/60 on 15x8's with 4.5 bs, and they are very close on the fender side (maybe 1 inch after I rolled the lips over). They have about 1.5 inch on the spring side. If I was gonna run 275's, I would relocate the springs and bring the wheel in a little so you don't rub the fenders. They may fit, but they are gonna be tight. My 255's rubbed in the corners until I got new leaf springs and a new front sway bar (1 1/8) and rolled the fender lips up. let us know, I may have to step up to a bigger tire if I get the engine I want

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I can get you pix if you want to see....