The steering coupler would be a problem , they have been broken in the past with people de powering the pump seeing that that coupler is rubber and somewhat rotted by now. The MKS universal coupler would help. I believe you can still get the manual truck boxes from the gear box rebuilds and shorten steering shaft, Just by all means keep your old box if you swap, starquests steering gears are only for our chassis. Many have been lost with core trade ins .