If you have a complete HEI distributor, you don't even need a pulse amplifier.
All you need is a 12 volt power source. I use a cheap wall-wort, plugged into
the back of the machine. There are three wires coming out of the dizzy.
One hot, one ground and the third is the trigger for the machine. Don't look
for a proper plug to match the harness on the dizzy. The only one made is
on the Kent-Moore module tester and they don't make that themselves. I've
got one, but it was a long struggle.