Lots of interruptions this month, did get time to put the new bed together last weekend.
Had some problems with the rear sill. The sill is deeper than the pocket in the bedsides. There are also no holes in the front side of the bed pocket to bolt into the rear sill. I cut the pocket to accommodate the sill.
I assembled the bed so I can mount it on the frame then determine the center of the wheel well in respect to the frame. This will give me the axle CL that I need in order to start building the 4-link.