dashpot on Holley 1920 or no?

Hi Guys. Quick question. My 1967 Dodge Dart with a manual transmission has the Holley 1920 carb on the slant six engine. I would have sworn this was the original carb. It does not have a dashpot on it, but the service manual says it should... in fact it says all manual carbs should have dashpots and the automatics should not. And the info I found on the internet said it was usually automatic transmission equipped cars that had dashpots, and not the manual transmissions. Anybody know what the right answer is? Do I need a carb with a dashpot on a manual transmission or not? Help! Thanks!