My fresh .060 over early 60s 327 appears to run cooler than the .060 over late 60s 350,same water pump and stock 56 V8 radiator. Both are flattop pistons the 350 has 68 291 2.02 Camel Hump heads and 327 has 60cc Flo-Tech aluminum 2.02 Camel Humps with Vortec style chambers.