I'm making about what you plan on and am running 1.5" adapters on the rear, atleast I was until last week. I'm running a T58. You will only be able to run a 7" wheel. I have zero traction in 1st and 2nd gear, even with the boost turned downed to 16 psi for the hell like AZ summer. In the winterat 18-19 psi I have 3rd gear traction issues. It's fun at times but annoying when you want traction and it's not there. In a week I'll have 9"s on with 275's . So yes they can handle the strain but the tires will not, not until you get into atleast 3rd gear. If you are serrious about your power I wounldn't run the 7's.