I would never roll fender lips.

I'm thinking 2/4 right now.

Also, HOW CAN I TELL IF I HAVE STOCK SUSPENSION???
It's kind of hard to tell with the 20's on!!

Also, WHAT IS BACKSPACING???

Thanks for all your help,
Nick

 

rolling fender lips isn't a bad thing, but you DON'T do it with hammers, etc.
you use a wooden bat, or if you have money to burn, there's a professional tool the guys on ls1tech use.

4/6 looks cool, but you'll eventually end up like the rest of use and lift it back up because it isn't practical for a daily driver.

look at your springs, shackles, and hangers. if they're painted differently, or appear to be manufactured differntly than the rest of the frame brackets, you've got a drop.

backspacing is the distance from the inside wheel lip to the mounting surface of the wheel.

 

FWIW, I have a 01 ex. cab with a 2/4 drop. Sits pretty level. I am running 275/45/20's and have only rubbed them once when I hit a frost heave in the road going around a left hand corner at 100 MPH.