I'd rebuild that body mount before welding in the box tube sliders. Then you have something solid to weld to the sliders...
Looks good on those 38's, although that is a lot of tire for the stock 10 bolts to deal with. Any plans regarding that? I'm also gonna rock the 1/2 ton stuff, but my plan includes alloy shafts, full case detroit, and sticking with 35" radials.
Rene