Thanks for all the great info.

So Grahams wiring diagram is exactly how I have mine , which is good news. The last 2 things to check will be...

1. Check for negligible resistance between the pertronix base and the -VE of the battery. This will indicate the ground wire between the distributor and ground is working.

2. Move the distributor shaft one tooth CCW and retest.

I will keep you all posted.