Glad to see the problem is apparently fixed. However I am going to make few suggestions just in case.

1. Your trigger wires are too close to the coil. Move the coil.

2. The nicely bundled spark plug wires looks nice but it is asking for a crossfire problem.

3. The two primary wires from the MSD to the coil should be twisted around each other to create a "twisted pair". They will shield each other reducing interference.

4. The trigger wires,including the pigtail from the distributor should be twisted together. Looks like the trigger wires may already be twisted inside their shield so they should be alright.

5. The alternator wire, the trigger wires and the coil primary wires should all be seperated from each other.

6. Twist the fan wires.

7. Twist the fuelpump wires.

8. Twist the power wires from the battery to the MSD.

9. The distributor cap should be vented when you have a high powered multispark ignition. Keeps ozone from collecting inside and causing misfire.

I hope something here helps you and the others out.

In theory, there is no difference between theory and practice. In practice, there is.