HARRISON Radiator I.D. HElp Needed

[CamarosRus]

Hello, I have a HARRISON radiator I'd like to ID the application

It is similar to a 70+ Camaro/Firebird radiator in that it appears to sit in those rubber pcs that fit into core support base area. It would then have a metal top hold down plate with the same rubbers holding inner edges
of tanks (R & L)

This radiator measures approx 28 3/4" from center/center where it would sit in those rubber pcs
28 3/4" C/C are those inner tank edges (??)

Right side tank is embossed A on one rib and J on next lower, with L and 1 (below the L) between the A & J.
Right tank also embossed with Harrison

I cant see any embossing on left tank.

Do you recognize this as being from a Chevelle or ???
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I also am looking for mfg that still offers OEM style 2 Row Core for 70 Z-28. These 70+ F-Body radiators
have a hat shaped metal piece that runs along top and bottom of core connecting tanks together.

Will need quality shop to install new two row core in my 70 Z-28 tanks

Thanks for your help.

Chuck Sharin