I had hinted at why the chassis cross bars were mounted above the frame rails earlier. The cab has two raised areas in the floor that the tubes line up with. This allows maximum exhaust clearance through the center section. Might even try to incorporate additional cab mounts and seat mounts into them. If you've been paying attention you've seen a couple different pics of engine set back options. I think "The Sweet Spot" has been found, see pic for measurement.
Getting the cab and bed perfectly aligned has proven to be next to impossible without bedsides. Started cutting up these brand new bed sides so we can raise the bed floor.
It's kinda hard to see what's going on here. This is the piece that was cut and removed from the bed side. It is now mounted into position on the bed floor. The driver side will be the same except where the gas filler is currently mounted.