37s will fit

 

I'm hopeful that was a joke Cody.

Although I guess technically you are right. I've seen it before but it was only a picture and he had about a 1/4" of travel in the front and rear. I doubt he could have turned more than 1/4 of the way too without rubbing.

I've first hand seen 35's on stock rims with a body lift and crank. It looks good but you have to cut quite a bit.

 

A dude on GMFS posted a pic of an rcsb Z on stock 05 17" rims on 37x12.5s with a BL and crank. Not saying I would do it but they fit. Im getting the gk bars, ford keys and shackle flip in the rear with 35s as soon as I recover from the damn bill from WCCH, from what I have read over on GMFS they should clear with minor trimming.