marine carb on a duster 360?

I ran one from a marine 340 on a 360 for a while. The airflow had to be restricted severely to get it to work. We took the back end of a Chevy starter & drilled holes in it & placed it over the carb opening.

It worked fine as a commuter that way, but performance sucked. Mine was free as well, I replaced it as soon as I could.