I've got this original GM copper radiator from my '79 LeMans Stock Buick V6 car it is 26 - 5/8" in length and i need to retain my original fan shroud. Could anyone help me out on how many row cores it is? I heard online they used both 2&3. I thought this one was a 2 core/row. I'd like to find a replacement and keep mine as a spare. Either used or new that isn't aluminum. (show car). I am looking to stay with stock copper/brass. Any leads? Thanks.