Street Demon carb on 1972 340 sb intake

I have a 750 Street Demon on a Weiand Action Plus spread bore intake no adapter, and my son has a 625 Street Demon on a factory cast iron spreadbore intake, with an adapter. Pretty sure its to elevate the carb so the linkage on the carb clears. I can check his this evening to verify, If you don't get a correct answer beforehand