I'm not afraid to cut it, it just opens a can of worms if you do - cutting the bedsides, trimming the bedsills, trimming the wood and bedstrips to fit, etc - for just a couple of more inches of tire. I think maybe it's better to either go for full tubs like ProStreet, or just maximize what you've got stock. I'm not building a ProStreet truck, so I'm just going to work with what I have and squeeze the largest possible sum'***** in that wheelwell.
SC