I got my core support tacked in. I made a hybrid with the old support and the new piece that I received from AD Engineering. It still needs to be plug and perimeter welded, but at least it is back to one solid unit. This will not quite fit a stock radiator. I am going to see if I can get about 1.5" taken off the bottom and reuse.
Then I need to shim to get the exact height, and then pull the whole thing apart to start working on the steering and brakes.