[Bob Lincoln]

If you can wait til next month when Marty is back, he apparently has some at www.arizonaparts.com:

2585788 CARB CHOKE DIAPHRAGM 1966-67 SOME 8 16.40

Or search on that Chrysler part number and find it elsewhere online right now.

http://www.mypartsgarage.com/wells-carburetor-choke-pull-off-cp114.html

Rockauto doesn't list one for a 1966, but the Chrysler number shows up in some 1978 cars:

http://www.rockauto.com/dbphp/x,carcode,1063987,parttype,6000,d,1978_CHRYSLER_LEBARON_5.2L_318_cubic_inch_V8_Carburetor_Choke_Pull_Off.html

 

[Bob Lincoln]

BTW, I had that same car and engine. Very common problem, I was only a teen when I figured out what was wrong with my mom's car. Once you get the part, if you are careful and precise about the adjustment, it will start instantly and run very smoothly when cold. Some people put manual chokes in, but this is better when fixed.

 

[Bob Lincoln]

Wow. Had to be a moron who removed the choke plate. Even if you store a car at 90F, you still need a choke to start the car when the engine is cold.