What is the biggest size tire I can put on my truck without having rubbing and crap like that? I have a 2000 350 with stock suspension

 

depends on the wheel offset. with a leveling kit you can run 35s

 

How many leaf springs in the front and rear?

 

Two on the front and five on the back and a helper

 

33s. 35s may rub. If so you can trim the plastic piece up front on your bumper

 

35's will deff rub. I have a 350 SRW w/ Plow package (3 up front & 7 out back), 35x12.50x16 rubbed up front. When turning they rubbed the lower portion of the front bumper & the rear of tire edge would rub the inner fender liner at the rear of fender.

Ive since gone to 40's & 8" suspension lift tho

 

I'm have a leveling kit and am running 35's on mine. I get a tiny bit of rub on the left front tire when I turn hard to the left, other than that no problems at all.