i'm still looking at these **** cepek mud country tires, but i see that i could get 375/65x16 .. it says that it is only 35.4 inches tall.. how much trimming would i have to do to the plastic piece beneath my bumper as opposed to a 35x12.50x16?

 

With what lift? That is a 375mm wide tire.

 

6" fabtech suspension lift.. being put in sunday hopefully along with some tires and rims

 

I don't know. I can't recall someone running a tire that wide with a 6 inch lift.