There are two connectors on your coil. + and - the double black wire from
the junction box goes to the + side.
The wire to your points, White wire to your control head, and a tach If
you have one goes to the negative side. Take the coil off and be sure
where each terminal is.
If you've accidentially connected your points to the +  side even
momentarily it will burn out your points and sometimes melt down your
condenser.
If you radio is hooked to the ignition switch on position you can also
burn out your points when you just turn your ignition on to listen to the
radio, because power is going to the coil for extended periods of time.
If the points just happen to be closed you could burn out your points. Be
sure your radio is hooked to the accessory side of a fuse.
Having had several Vanagons in the 80-83 range I've found a wide variety
of "get me by" parts installed.
If your van will run, then the coil is probably OK. If it's not Bosch
check for numbers and confirm that it willl work on your van by checking
the Applications book by the coil manufacturer.
80-83 Aircooled vans use *solid core wires* going to the spark plugs. It
can have a resistor wire from the coil to the distributor or a solid core
wire, It will not run with Resistor (carbon fiberglass) spark plug wires.
Mine runs OK with a resistor wire between the coil and distributor cap
but It came with a solid core wire here.
The rotor arm has a built in resistor, it should have a short black area
between the center and the brass end of the rotor contactor. I'm noe sure
but I'd say it needs this too.
Make sure you've got *non resistor* spark plugs. Check the Bosch, AC,
Champion or other spark plug applications book at the parts house and
make sure the plugs are non-resistor plugs.
Check the brown ground wire at your Double Relay. Put it under its own
screw, squeezing it down under the double relay isn't a good ground.

That's all of the things I'd do if you brought your Vanagon to me to
troubleshoot for an ignition problem.

Stan Wilder
83 Westfalia Air Cooled