Ummm... the "ignitor coil" was a single piece I thought.

Anyways, a nice simple way to test it would be to remove it from your distributor (Be REALLY damn careful not to strip any screws) and take it to your local Autozone. They do free testing for ignitor coils.

Anyways, all you have to do is run a resistance test on the contacts in the coil. Nice and simple, but I don't remember the resistance ratings off the top of my head. Things to note: You MUST be within a specific temperature range to get an accurate reading, and even .5 Ohm out of spec can be considered defective.