well i just recently swapped my 350 for a 400 sbc.bored .30 over to a 406,3 angle valve grind.such an such..looking at about 450hp at the flywheel.so ive read alot about the 400's and people often say the tend to overheat.imo i think its just mis-treatment.so my question is.has anyone swap their Radiator for a larger one?or does anyone know of the top of thier head the largest i can fit in my car?i want to keep this motor cool.some day soon i will get a video of the car but i need exhaust 1st.thanks for any help/input

 

im not really sure on sizes but i know that if u plan on really working the motor then you should shop for heavy duty radiator. take a measure of the one you have and go to auto zone or watever and compare the sizes. i made the mistake of buying one too big for my radiator slot. sorry if that doesnt help u out with your question

 

i Used the stock 3 core rad and have no problems.