I have a 68 RS Camaro that had a 6 cylinder with 2-core radiator,four blade fan,and no fan shroud. I just installed a bone stock 327/210 engine. Can i get away with the 2-core if i add a shroud and a 6 blade flex fan.I know G.M. put 2-cores in some of their 307 engines. I personally owned a 70 Nova with a 2-core and had no problems overheating in traffic. What do you guys think?