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Old 07-07-2019, 03:23 PM
Bernhard Bernhard is offline
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I know this not a direct answer to you question.
But the key to good tire fitment is mock up.
The car can have more clearance on one side than the other because the frame is slightly shifted to on side or the other. This can occur for multiple of reasons and may have come straight from the factory this way.
We would move the rim inward by increasing the back spacing . You do not have to shorten the diff just increase back spacing.
I would start with moving the rim inward as far as you can go with out having tire rubbing issues.
Mock-up is key to good tire fitment. We would use inexpensive steel rims during mock up.
I would go with a 15" tire & rim, they fill the wheel well better and adds to the joy of driving by providing superior performance.
All tires have slightly different profiles / bulge so it good to know the tire you want to run.
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Last edited by Bernhard; 07-07-2019 at 03:49 PM.
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Old 07-08-2019, 12:18 AM
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scuncio scuncio is online now
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I’ve only run 15x6 Cragar GTs on mine with a 215/70 tire. No issues but you already knew that....
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Old 07-08-2019, 02:57 AM
L78M22Rag L78M22Rag is offline
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Quote:
Originally Posted by scuncio View Post
I’ve only run 15x6 Cragar GTs on mine with a 215/70 tire. No issues but you already knew that....
Tony, I figured you would have gone through this same scenario. Funny that we both settled on the same wheel. I’ll look for a set of 15x6 Cragar G/Ts. Thanks.

Thanks for all the input and ideas everyone. My goal was to find a vintage set of Torq Thrusts with enough backspace, but no luck so far.
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Old 07-10-2019, 01:51 PM
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I’ll try another couple options for you and let you know what fits.
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Old 07-10-2019, 03:55 PM
tom406 tom406 is offline
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'66/'67 GTO's are tricky to fit a rear tire. Those voluptuous quarter panels make you think there's a lot of space, but as was stated earlier, they won't even take what fits on a Chevelle. When we built this '66, we found that the inner fender outers are shaped a lot more conservatively, and come in even a bit more than the fender lip as I recall. Early '66 GTOs were fitted with the '65 width rearend, before changing to the "wide track" one inch wider unit for the rest of '66/'67 production. On this car we used stock wheel wells but had a custom 9" rearend made. With that rearend I was able to use a 255/60/15 on an off-the-shelf 15x8" Specialty Wheel (via Coker) chromed Rally I.
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Last edited by tom406; 07-10-2019 at 05:08 PM. Reason: Add better pic, correct wheel mfg
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