Poke your welder in there and weld the front nuts to the radiator support, stick the lift under the cab and pick up on the body until it relaxed the suspension about 1" (a lot of pressure) then buzz the cab bolts out with an impact. If you have to pull the carpet back and hold the nuts with a socket. Once I started welding the front nuts I cut my cab removal time on a 6.4 by half at least. F those two bolts