Don't know what that 3128515 is out of, maybe a GMC or some other GM product line? A 2" core is pretty much standard, and you shouldn’t have any problems with a fresh cooling system. I’d run a 4lb. cap to give my self a little extra insurance. Your getting into the HD radiator with the 3" cores and I don't think you would really need that unless you’re planning on doing a bunch of heavy hauling.
The Walker radiators are expensive because they are using really good materials like they used in the radiators years ago. The Cobra line is the top shelf brass radiator. Also they are very good reproductions that fit. I’d put them in the same category as Mar-K when it comes to quality.
I’d stay away from all the import stuff and the aluminum radiators are nice, for a hot rod but not very original, quite expensive and not easy to repair if you have a problem. And aluminum just doesn’t stand the test of time like brass does.
Denny Graham
Sandwich, IL
Last edited by baldeagle; 01/08/2013 3:11 PM.
