Cranks but won’t start?

Alright folks I have had it with my 73 Duster and it's lack of ability to start, I hope you all can help me. I have searched the forum and read through every single post concerning a no start and I have triple checked the entire system with no luck, please help.

Little history: I have been building this car for about a year and half, the car was originally a slant six car and now has a bone stock 360/727. Motor is timed properly and is getting plenty of fuel. The main problem I am having is weak and intermittent spark from the coil only about 11V or so and obviouly no spark at the plugs.

New components:

Plug wires
Cap
Rotor
Plugs
ECU (5 pin)
Battery Cables
Coil
Fuel pump

Please help I want to get her running...

Brandon
Author: admin