My built 440 runs 12.5 domes etc on the street.I run an old MP aluminum water pump housing and pump.Runs 22 inch rad that was an OE 65 cbody with shroud.Has March underdrive pulleys and flex fan .That rad was damaged so i run a Champion 150 buck one from ebay.Been in 4 years.Never gets over 185 even when its 90s out.Seems many with electric fans etc have problems My kid ran the same setup in his 62 300 413 except he had the OE rad recored Never ran hot.Now his 360 built truck runs stock rad and the same setup.Also never gets hot.