6.0L and STS 5psi got Allen in the 11's. If you want to go cheap and turbo then you can always go w/ a 5.3L STS turbo or custom front mount turbo. I think a 5.3L some stock 6.0L heads and a turbo cam will get you in the 11,s. Your biggest problem will be traction. If you can hook I think it will be very fast.

A motor built like this will be very comfortable to drive.

Are you wanting to spend the money on a built bottom end?