Distributor Connection Question

I reversed the Distributor rotor pickup wires, and reconnected and soldered them together.
On a test drive, At low throttle and 1/2 throttle it runs great. at Full throttle it has occasional stutter every few seconds. I did not notice this with the Mopar ignition, but do on the GM Ignition.
This is my setup to keep the Mopar look.
1674340317963.jpeg
With this layout minus the ECU this shows and using the 1st Pic.

1674340400414.jpeg

I verified my connections and grounds.
I did not check the timing since it ran well before.
I did regap the plugs to be 40.
DKamp