I'm going with a 2.5" leveling kit on my 2005 SCREW.....I was planning on putting 33X12.50X20 on......wheels have 6" backspace.

Should I stay withh 33's or try to squeeze in 35's?

Also, should I change shocks with install of levelers?

 

Personally, I'd stick with 33's. As a general rule on a 4x4 with a leveling kit you can fit 35x12.50's using the OEM wheels or 33's with aftermarket wheels.
As for shocks, I'd do one or the other. You can install Bilstien or Rancho shocks which feature adjustable spring preload. These eliminate the need for a leveling kit. You can't combine the adjustable shocks and a leveling kit.

 

Thanks for info Wandell....I'm going with 33's!!

On shocks, wasn't looking for lift just wondering if folks had went with a stiffer shock with bigger wheels/tires setup.