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			It varies a little per car.  I'm going through all these scenarios right now, as well.  What size rim are you going with?  I believe Frank told me the 335 on a 12" rim has a section width of 13.5" and on an 11.5" rim it has a section width of 13.2".  I've heard to trim anywhere from 1/4" to 1/2", but it's better to cut a little too much than not enough, of course...especially before paint.  I have the same question.  I have repro quarters, so the factory spot welds are history and it's hard to tell the plug weld after is has been ground.
 My car measures 14-1/8" from the inner DSE tub to the quarter lip at the 12o'clock position.
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