Radiator ID

Hello, I found a radiator in a relative's garage recently and was curious what it is from. Core is 22" wide. There is a port on the RH side of the upper tank that I am unfamiliar with. Any help identifying would appreciated. Thanks

Can't ID it, but the extra removable plug on the right side would indicate its an emission era mid- late 70s radiator, that removable plug would be for a temp sensor for the dist vacuum advance or something else.
Or it could be an industrial use radiator, lots of slant 6s were used in industry for fork trucks and such. Can't tell how thick the core is, most industrial applications would be thick 3 core radiators.

i would have to think this is on the money.
i have seen many with the vacuum temperature to distributor fitting on aspen/volare applications, as well as forklift applications using that type of radiator.

Thank you for the replies. I didn't think it was anything special. Just was curious what vehicle it came out of. Currently it has a 2 row core. The bottom tank looks wide enough to go 3 row. Upper tank is 3.5" wide so plenty wide enough. Again thanks.