I agree it can be done, but imo to do it right, you want to not only have it be able to mount to the core support but you want a 26" opening in the support so that you are pulling outside air through all of the radiator. If 3 or 4" of the radiator is blocked by the 22" support structure, you are defeating 1/2 the reason for going to the 26" radiator.
Anyway, if we go back to the topic starter's dilemma, I still say a BIG 22" radiator will get the job done and avoid the trouble of hacking up your core support.
