I'm in the same boat. 1969 Coronet with 318. Tonight I'm going to order a US Radiator from Classic Industries. Classic Industies calls them OER but I'm pretty sure they are made by US Radiator. Made in USA. I'm going with the aluminum version. I read a post on the forum where someone bought one of these radiators. The only thing different from the originals is that there are holes instead of studs for mounting the fan shroud. Last summer I took the radiator to a shop in Muskogee and the guy said it needed a re-core and it would cost at least $600.00! I took it home and epoxied the hell out of it. It's held up but I don't trust it once the weather starts to warm up.