Here are the pics of the clearance. The tires are 35" and I have 8 1/2" from top of rear tire to the bed, and 6 1/4" from the top of the front tire to the fender.
Spoke to Towcat and found out that this truck had been "lifted" with larger blocks in the rear and springs and drop brackets in the front. I was told that it was factory, but the PO could have been mistaken about this. I'm not complaining, but I'm glad to find this out now rather than go through all the work to put the rearched springs under it and find out it sits the same height.