Wheel Spacer for 2007 with 3" lift and stock rims

Can anyone tell me for sure that i do or do not need wheel spacers in order to run stock 07 rims with a 3" revtec and 285x70x17's.

I have seen a bunch of topics on this and to be honest Im a little confused. I hear some people saying will not fit with out 1/2 spacer, ive seen 1/4 inch being the requirement and still others saying no spacer is needed at all.

As far as rubbing, i'm not worried about anything that can be trimmed, i want to make sure i dont rub any of the suspension parts with the inner sidewall( A-arm or anything else in there)

Thanks for the help.

 

you do need