first, is a dashpot required for a autolite 4100 running a manual transmission (three on the tree W/ OD)

Second, the small threaded hole on the choke side of the carb at the baseplate? is that for a vacuum line??
thanks for any help

Hey Mr.H,
In the not too distant past, I did a rebuild/restore of an Autolite 4100 1.12 C4AF-9510-DG Carburetor.

http://msamericanpi.bravehost.com/galaxca.htm

In all the research, and advise from everyone who so graciously helped out, it was concluded that the Dashpot was to keep an automatic transmission from stalling IF the gas pedal was quickly released.

I have chosen to leave it off the the above mentioned Autolite because I too have a three-speed, w/OD.

It comes under the heading of "Wouldn't hurt/Wouldn't help".

Hope you are well.

JC

first question answered.
Now if anyone can tell me if the small threaded hole in the base of the carb on choke side is for a vacuum line, I'm good. thanks again.

The dashpot is for automatic transmissions only. Designed so the engine does not stall when the throttle is totally removed.

As for the little hole on the side, yes that is you vacuum line that goes to your distributor and controls your vacumm advance, its what as known as carburetor vacuum which is different than manifold vacuum. Lot more pricise as far as engine needs are concerned, especially when it comes to running your vacuum advance.
Some carbs don't have the hole just and inlet tube, Your carb must be a pre 1964?

Be really careful with that little 3/8 brass nut, its a common one I find rounded off.

Bill White
White Automotive