I had a bored out 440 in a 61 Imperial. It was 448 inches, beat Lexus and towed other cars and trailer loads of parts. Where is it today? It now has a 413 with 440 heads. Less horsies, maybe a few ponies. But still tows. It is my 61 LeBaron. Been driving it since 1983. Joe machado, ps, never overheats and I live in Palm Desert, Calif.