Nice truck! I like the picture with the dozer on the back.
For shortening the frame, like ED said, find a straight section behind the cab, between 2 x-menber. Measure twice and cut once.... A comment way is to but weld the frame, than "fish plate" over the welded area with the cut section of the frame (if long enough) cutting the upper part of the C to create a L and welding it over.
Frame welding is not for everyone, propper V notch, root pass and good weld is a must. Fish plate can be welded around and through some drilled holes.
Just an idea that works for us...
J.F.
