71 340 running bad

How many times are u gonna have to be asked? What is the magic number?Supply us with some real world numbers. We can’t help u if u won’t help yourself and us. There is already 2 pages of guesses. I once had a pick up in the distributor cause this same problem. Check ohms on all ignition components. Are 5&7 wires crossed up? How many volts to the coil key on engine off and engine running? U have done excellent work on this whole build. Now do the same with this engine. To much preload can cause these issues.
Kim
How many licks does it take to get the center of a Tootsie Pop? The world may never know.