Got about 7 more hours out there today. Made great progress on the radiator support. Everythings clamped and nice and level. Once I have the rectangle end caps made for the section I'm boxing in, I will probably go ahead and weld it up. I gave myself just a hair under 1/4" gap under the radiator. This new radiator support sits just slightly lower than the stock radiator support. This will allow me to bolt on a stock licence plate mount, and the radiator support to K frame brace although as beefy as this is, that part is probably not needed anymore.
I plan to radius the bottom corners in a similar fashion to what I did with mine on the 67, as well as punch some 3/4" drain holes in the bottom. The 1" access holes on the inner boxing piece for the lower latch support mount bolts are that specific diameter by design. Once everything is installed lined up and painted, I will snap some plastic body plugs over the holes to keep dirt and junk out.