how big part 2
 

I have a 02 Supercrew 2wd and Im going to put a 3 in body on. What size tires would be a good choice without being "stuffed"?

A 3 inch body lift on your 4x2 is gonna put you at just about the same height as a stock 4x4. I'd suggest 33's. Either 285/75-16(33x11.50) or 305/70-16(33x12.50) would look good.