About I a month ago, my iginiter failed on my 1981 truck (22R), and I put one in from a buddy's truck and it fired right up.

Then, I set this up:

http://www.google.com/url?url=http:/...zItV9r5Df_53ig

At first I mounted my GM module directly on top of my old Toyota igniter, thinking to use the heatsink capability. Didn't run. I then mounted the GM module directly on the firewall, which I had sanded. It ran, but would drop from 14 volts to down around 10 when you gave it significant throttle. I secured the ground strap to the module better and all was good (Except it did seem to take another couple cranks as opposed to previously).

About a week ago, the troubles started mounting. Occasionally it would take minutes to get it started. And then later start right up (although still taking a little longer than original system). Then it almost died on the freeway, which was without a shoulder due to construction, and I had to keep the RPMs above 3000 to get home. The coil was very hot when I arrived.

Thinking maybe I had lathered on too much transfer grease under the module, I wiped it to a more thin layer. The truck started and idled at different times throughout the day. But upon reving the engine the voltage would drop from 14 to 12. The next day it would not start. I said forget it, and put my buddy's low mileage factory set up in, which fired right up a month ago, and now nothing.

1) Did this setup damage something?

2) Did my distributor pick this moment to quit?

3) Why the occasional hard starts with the GM system?

4) Why the drop in voltage when I revved?

5) I heard mention of a resistor. Is this for power wire or tach wire? Is this when using a Toyota coil on GM module only, or also for GM/GM?

This is my only driver and I am beside myself.