Craig, to give you some idea......here's the minor trimming of the front cladding. I realize you're talking 16"s and mine are 18s.

I have 285/60-18s on OEM 18" rims, and NO TB cranked, and no lift, no special springs etc....and this is ALL I had to trim...and it's very easy.

Like Tom4Bren said, we've seen several instances where people encounter slight variances and tolerances, so you may have a slightly larger or smaller piece to cut, etc... vt. mav said he had to trim cladding to a slightly different degree on each side for his tire/wheel application, so he obviously had some variance, but all very doable.