+30 Offset on a 00 Chevy Fullsize

Is this going to be enough offset for the tires to tuck on a 20x9 inch rim with 255/30 series tires?

On a buddy of mines truck we're running a +30 on a 22x9.5". The front tucks just fine, the rear we will have to flare out just a bit, but since its a stepside it will be as easy as making some brakets to hold the plastic bedside out a little bit. I would imagine your fine with that offset, but im far from and expert on these NBS chevy trucks.

:ACROPOBIA:

and hes running a 255/30/22

Sounds like I should be fine then since he has 9.5" rims. Thanks for the info.