Carter AFB 4120S

Hi - I do have a a 1967 273 Commando engine with the Carter AFB 4120S Carburetor that will go into a 1966 Plymouth Barracuda with 4-speed manual transmission.

The carburetor was designed for a automatic transmission (as the book says). In fact the carb-number for a manual transmission should be correctly AFB 4119S.

There are some differences between the two carbs:
Vacuum Kick (drill size) 4119S= 1/8" - 4120S #42
Fast Idle Speed (r.p.m) 4119S= 625* - 4120S= 700*

Does it cause problems to use a automatic-transmission carb in a 4-speed manual car?

Thanks a lot.