You're another guy who needs a shop manual, download one here:
http://www.forabodiesonly.com/mopar/showthread.php?t=132309&highlight=manual,+download
Unless there's something seriously wrong with the carb, like the float level way way too high, or the choke stuck closed, the carb does not normall cause "shaking," that's usually an igntion problem. I guess maybe if the idle was so lean, it might.
There are only a couple-three adjustment screws on the whole carb. Should be an obvious one acting on the mechanical linkage, for the "curb idle." May/ probably is another for the "fast idle" when the choke is in operation. The (normally) angled screw near the carb base is the idle mixture. Turn it out for rich, in for lean. Normally, start out 2-3 turns. Turn in until the engine starts to slow, and stumble, then out to smooth out. Smog cars run on the lean side of this setting. Make sure the car is UP TO temperature for this
There ARE some settings you need to check and sometimes adjust when cleaning the carb Usually right in the "carb kit" destructions. Such things as float level, "choke pull off" which is how far the choke butterfly opens when the little vaccuum pot actuates on start, and the linkage for the accelerator pump.
This is certainly one thing to check for "hard starting." Remove the air cleaner, look down the throat, engine off, choke open, and actuate the throttle. There should be a visible squirt of fuel from the accelerator pump when operating the throttle.
Hard to say, it may be getting "too much" or "too little" on startup, or fuel boiling on shutdown may be causing gas to flood over into the intake manifold.
Life ain't simple.
