w a 455 youre likely to have hot issues....radiator in these are smaller than the cars that had 455s...it CAN be remedied, but my friends who have them , have lots of issues...300 should be fine...
Drove mine the other day when it was 95 here in AZ. No problems ever with 4 row copper radiator, Hayden H.D. fan clutch and 7 blade fan.
