Big Block Copper Radiator - Classic ?

[440WB]

This looks like its made by 'Classic Car' -
its a New Copper/Brass Radiator

concerning this radiator that came with a car I bought in 2002 -

the person said he paid over $600 for it -
the only numbers on it is 374 on the top -

It looks like it would fit a big block rad support -
Automatic -
Large 3/8" x 2 core 2" wide   
17 1/2" x 26" center
27 9/16" bolt center across
inlet upper driver left 1 1/2"
outlet bottom pass 1 3/4"

flange mount holes pass side 7 1/4" and/or 10 5/8" center
flange mount holes driver side 12 1/8" and/or  14 5/8"center

trying to I.D. this to sell it correctly

any help is appreciated -