Update: 73 450sl runs horrible

[JBR]

Autozen, you really seem to know my car. Thanks for every thing.
No real work done yet, 50MPH wind and 21*f outside. But I still looked at the car.
Fiddled with some vac lines, since no one has a vac diagram for a 73 450sl FED. Haynes is mostly generic.
Dist. vac line goes to a switch over valve, mounted on pass. side near coolant pressure tank. then from there it goes to the base of air intake (where the air filter mounts). Replaced that line.
Took the dist. cap off for ignit. point inspection. Points all brand new even has a little semi clear plastic protector over the contact area.
Inspected the inside of the cap. WaLa I found all kinds of water droplets on the inside of the cap. This has to explain the very rough running. I will contine with the dist. work this weekend.
One question- there are 2 more switch over air valves(shaped like large acorns) mounted close togather on the mid to pass. side fire wall.
One has a vac line on top with 2 vac lines & electric connector on bottom.
One of the bottom vac line ports is open (nothing connected to it) the other one has
a red vac line to it but goes 10" and is pluged with a wood screw. Seems weird.
The 2nd. switch over valve-has a line on top 2"long and goose necks and is left open, the bottom has 2 vac lines connected, one goes to the lower part rear intake manifold. The other tees off in many directions, one tee goes to a small plastic check valve, then continues. Does any of this seem right?
Thanks