Pls help decode origina Harrison 4 speed radiators

[69gmmuscleluver]

I discussed 1 of these radiators in the past but never got a clear answer or even if anyone really knew the application. The first 4 core radiator I'm quit certain came from a 70 396 Camaro Z27 but I'm unsure how to positively identify. As for radiator #2, I can't remember where I picked it up years ago but it still retains the original tag with numbers. I tried to search for the numbers on the tag but was unable to find anything. If anyone has suggestions please help. Thanks again.