My 340 in my 66 developed issues :-(

Not to influence you here (or suggest GM parts - I know folks are a bit sensitive about it), but since your Valiant is from the points era, you might want to try running a GM HEI ECU hidden under your distributor with a Designed2Drive adapter. The HEI unit lets you run a low-resistance coil and open your plug gaps a bit wider for a hotter spark.

Best bit is that the combo hides under the distributor so well that it'll look like you're still running points:



I left the ballast resistor on the firewall in my build, but soldered in a solid wire between the tangs.

-Kurt

Thanks for the idea Kurt!
For now though I'm going to stay with what I've got. I have to many irons in the fire as it is.. But I am intrigued on how your system works? What wires go to the HEI pickup?