"...The 37x12.5 BFG MTs on the stock rims rubbed at full lock..."
Ditto on mine. Switched to the milder tread patterned BFG All-Terrain's in the same size and NO rubbing whatsoever. And, like you
guruerror, I've looked at 38's since (did this awhile back, and is why my duece still has an MT as a spare
).
Stopped by Discount Tire last Fall and had them test fit a pair of 38" Geolandar M/T Plus's on the front and they looked fantastic! But they DID rub a tad on full (left) lock. But remember, I was stock height...no key lifts or anything.
HTH.
Buck. 