22's offset??????

I have an 06 chevy crew cab laying frame. what is a good off set to run on 22s? i want them to tuck in good.
What does averyone run. with this set up?  

on my 04 crew cab i have 22x9.5 with a plus 38 offset. lowest offset you can go with factory axle is +35. you can have a +30 with a 9'' wide wheel.

Im running 7 1/4" backspacing on a 10" wide wheel and mine clears pretty good. My wheels are for sale if your interested.

How much?