Checking an Ignition Ballast Resistor

[Jeff/Illinois]

I did a search and didn't really fine what I was looking for.

My question is, what should the Ohm reading be on a good ballast resistor and what would it be on a faulty one. Rheostat looking resistor under the dash, '36 Ford with a '46 59AB flathead.

One last question. Where do you buy a GOOD dist. condenser for a crab style distributor also a '46 59AB engine.

Thanks much.