When the original radiator shook apart at the seams between the tank and core, and the soldered on mount also came loose, I found a 3" radiator in a wrecking yard and put that in my 1-ton. No more cooling problems for many years till the t'stat failed. Not only is the core thicker but the tank is bigger too.
I was advised by an old timer at that time NOT to bolt the radiator in with all six bolts. He said "two on one side and one on the other will let it work so the shaking in the sheet metal won't rip it apart." I did that. I am now an old timer and I've not had that failure since -- going on 50 years. Not such a big deal on half tons but there is a reason the front sheet metal is bolted to the frame in one place at the center on the bigger trucks. The frame twists quite a bit on rough ground and everything bolted to it must accommodate that motion. On trucks with serious power, the engine torque twists the frame a couple of inches. Watch a semi pulling off from a stop sign sometime. Many trucks I've worked on had the whole shebang mounted on springs held down with castle nuts and cotter pins. Rubber cab mounts too.
