What radiator are you running?

Got the 65 barracuda running, but I don't think the slant 6 radiator is gonna keep it cool. the engine is a 318, .030 over. mild cam. four barrel. without a thermostat its running at 190 idling. 904 transmission. I don't know if I can maintain this running a thermostat, and driving in town at redlights, with stop and go traffic. Is anyone running different radiators from later vehicles, or something that will interchange? I want to look around , before I spend a lot of cash for a new aftermarket. Thanks.