Crazy huh...certainly would have leaked, but for guys with a cast baseplate could have even brroken the carb when tightening
I have seen that too, Ebay cheapy that I did the same thing when I ran a carb on my car. FWIW my Edelbrock EFI IAC makes funny noises on the truck when cold, but not hot, the Mustang system looks the same, but uses a Ford IAC motor not a GM and is silent.