What are these things?

[dabbrowne]

Hello

I could use some help identifying these 4 things from under the hood on my 1973 CJ5 with a AMC 304 V8. Please see pictures

1) Long cylindrical thing next to radiator
2) dull silver Box on side of wheel-well with several wires
3) Shinny box on side
4) round black coil on the side.

Thank you, it has been 20 yrs since I looked at an engine.

 

[jeepardy]

1) Long cylindrical thing next to radiator
Looks like a homemade radiator overflow, only issue I see is looks like it's pressurized using a freeze plug bung.

2) dull silver Box on side of wheel-well with several wires
Duraspark ignition module

3) Shinny box on side
External voltage regulator

4) round black coil on the side.
Starter Solenoid