Atomic 4 carb replacement

Oct 10, 2011
619
Tartan 34C Toms River, New Jersey
I should know this but I am having brain freeze. I have a early model Atomic 4 w/early model carb.
It is time to change the carb as I have rebuilt it several times and just can't get it to run right. I purchased a used one that has a scavenger tube. I purchased it from one of our SBO members.
My original carb did not have one, can I just plug it?