22 or 26 inch radiator

It looks to me like it has provisions for both. I just spoke with the guy who has the 26 and he said it came out of a 73.
The next thing would be the fan size. I think the 22, at least in my 6 has a 4 blade 17.5" dia fan. While the mash-up with what looks like the correct 26 for the 73 and up in my 70 has a 7 blade 17.5 diameter fan. While the opening is smaller the wind on the front has a cooling effect and back side is fully exposed to the fan which I believe does the brunt of the work. I assume the extra coolant has an effect as well. While I'm looking things over I see its missing the coolant overflow canister on the 70 while it is present on the 72 and 74....hmmm.