My 65 440 that built large runs a stock never touched rad.Its a C body 22 with factory shroud.I run a SS 18 inch flex fan.Never overheats even at the track and idling in the 90s.When I street drive in the 80s,90s it still never goes over 190.My kids 62 300 built 413 also runs a 22 factory.It runs like mine never over 190.His was recored to a 4 row about 12 years ago.Rocky