I did the same swap for a friend with a iron six pack intake and stock 1970 carbs, the six pack was .15 ET quicker and 2.0 mph MPH faster than the Torker and Holley shruggy
Every Mopar BB that I have increase the fuel and airflow to went quicker and faster, from a single four barrel to a six pack to a tunnel ram shruggy

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)