I'm 75 and I have a 57 Thunderbird with a 428ci FE. I'd like to swap in a Megazilla 7.3L/10R80 to have an ICE with EFI that would run without restarting 5 times, gets 12+ mpg, doesn't leak oil everywhere, manufactured in a Ford factory. I'd like to do this swap before I get old. It's 11/19/23...