[J Knight]

Thanks for the firewall/floor pics, it looks like the front cab mounts are the same as a c10 but I didnt see the rear cab mounts.

You mentioned cuting the frame to shorten the wheelbase, a common technique used on big class 8 trucks is to move the suspension and crossmembers forward, remounting it to the frame and cut the excess off of the end of the frame rather than cut a section out of the middle then welding it back together. Just thought I would share that as an option.