I am going to lift my truck 6.5 inches. With a 3.5 inch spindle and a 3 inch coil spring spacer. Does anybody have any input on what size tire i can put on? Thanks

 

Knowing what kind of truck you have and what wheel you are gonna use would help.

 

I have a 2000 f150 extended cab 2wd. I am open to suggestions on the wheel type as well. Thanks

 

First, if you use a 3 inch coilspring spacer you will need longer, aftermarket upper control arms to get the alignment within specs. 2 inches is the limit for a spacer (or a lift coil) with the OEM control arms.
With 5 inches of lift, I'd go with a 33 inch tire on an 8 inch wide wheel with 4.5 inches of backspacing. If you go higher than that (maybe add a 3 inch body lift also?) I'd start looking at 35's.