While I'm waiting for the hinges, I bought materials to fabricate the lower radiator mount. I cut some .080 mild steel flat stock to length, drilled the mounting holes, rounded the ends, then carefully measured and welded the tabs. Drilled holes in the stubs on the radiator for 1/2" hitch pins. Assembled with rubber grommets, the mount, flat washers, and secured with hitch pins.
I'll cut the bar to length and weld on mounting flanges once I'm certain the position of the radiator.