ordered my skyjacker 4' lift for my 94 1500.. and i had some questions...

do i need to change driveshafts?

What is the biggest tire i can fit under my truck without havin to do any mods or a little mod?

do i need to change anything else??

 

dont need to do any thing to the drive shaft.. you can fit 33" tire easy maybe a 35" tire..

 

on a stock rim?

 

You probably could. The biggest thing to look at is the back of the front wheel wells.

 

From what I've read on stock wheels you could probably do 35"s but you may rub on the control arms a little. If you want to avoid rubbing on the control arms you need some wheels that stick out a little further.