Matt,
Your logic on how to test clearance appears sound. I can't imagine that an extra 1/4 inch out from the car would cause a problem, especially with the 225s. Of course, by 81, my car has the big fender openings for tires, but even on your '69, you are getting further from the suspension and I doubt that your tire was ever getting within 1/4 inch of your fender lip before the upgrade...
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It would be a good test. The logic is correct. You could also just look at it without the spacers, and measure another 1/4 from the tire.
225/70s will fit fine with the 1/4 change. 255/60s may not.
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I tried the spacers, doesn't look to be a problem. The only thing I could think of that I may get a few more knicks down the side from the wheels sticking out farther, but I was planning on clear mudflaps after the new paint anyway.
Thanks for helping me think things out. Ordering the new torque thrusts Monday.
Matt
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