They need quite a bit of cracking to fill up if fuel has evaporated off.
idling issue may be due to a blocked fuel channel that feeds the brass idle jet tube.
At the base of stage I main jet removed, you will notice the small intake port ,it may be clogged with fuel residues .
The idle issue was due to the chokes being WAY off when I first put the carbs back on the car. (All ports were/are well cleaned.) I initially got around the no idle by disconnecting the electric to the bi-metal springs and manually adjusting the chokes. I had since got the car running with electric to the chokes, but never got the car running with the hose from the top of the valve cover attached to the air cleaner. There appears to be too much very rich blow by. Also, I think I've got a significant vacuum leak (or many).
The car idles now and my main issue is stalling in gear. The vacuum pod (can't remember correct term right now) does actuate, but not quite fast enough to keep the car running. So perhaps the problem is vacuum related.
I got to the point with the idle and the chokes where I feel the right thing at this point is to go through the 14-step manual I obtained and printed from the jamiekop website. It's time to at least make an attempt to synchronize the vacuum on the two carbs. I don't have the tool for the job, but did do some research seeing that people have made adapters to fit the carbs with rubber boot plumbing fixtures, but one person said that they can get it good enough by simply listening to the sucking sound with a shop vac hose.
So... As you can see, I might as well just part this one out at this point instead of going through this academic/science project. I sincerely find it fun, but I'm running out of time. I need to make space for a 1985 280sl 5-speed, one that I really think I might use as a daily driver. (And when I say "make space", I mean get rid of three cars so I can bring a new one home without getting killed by my wife.)
I have someone who has provided me a standing offer on the car who will most likely be parting it out. I'm pretty close to accepting it, but will need to dolly the car about two hours away.