Rick, I ran 335 KDWs on my '69, but I did so on an 18x11.5. I did not roll the wheel well lips at all. Those tires had a tendency to rub a little bit on the inside. I've also run 335/30/18 PS2s and 335/30/19 NT05s, and neither of those seemed to rub. I think the BFGs are just physically wider than the others.
Matt
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