22x10 on bagged 2004 silverado back spacing?

How well does a 22x10 with 7.25 in. of backspacing tuck on a bagged silverado? How is the turning radius with the 10 inch width. Do you have to air up for every turn or is there decent clearance. I know bonspped and intro make a 8.5 in width but i'm pretty stuck on the boyd viper 6. Also does anyone know if boyd coddington will every do the 8.5 inch hoop on the 22's. I e-mailed them and they are trying to say it would cost another $1000 per wheel on top of the price. I don't understand that because the 8.5 hoops are available but what can i do.

Thanks Trevor