Anyone else using MegaSquirt on a LA motor?

So im bumping an old thread here, but hopefully y'all can help.
Ms2 3.57
Lean burn distributor
Msd streetfire box triggered through points wire from megasquirt
Diyautotune harness with sheilded distributor wires
Batch fire
All grounds to passengers side head, additional 4 gauge ground from drivers to trunk mounted battery

Ive had this car kicking my *** for the last 2 years. Right now im fighting ignition and noise issues. It WAS hei8 setup, and we decided that was the issue. Hence the msd box. Now, even more noise causing tach spikes and drops.

Im grateful i found this thread, which confirmed my wiring to the lean burn. Could it be rotor phasing or air gap in the distributor causing issues? Distributor is an a1 cardone reman.