Further analysis. This 6A is very similar to the mid 1980s model dissected
http://www.giordanobenicchi.it/ECU/msd6a_02.pdf]in this writeup[/url]. The damaged area is in between the transistors marked Q15 and Q16.
View attachment 1716436339
One of the resistors is completely obliterated, and one is burned until you can see the spiral inside. I think the rest are just splattered with the char from the other two. This is the circuit that drives the transformer, and it appears the resistors that trigger the transistors were overloaded.
Could I fix it? Maybe. I'd need to determine the resistance of the damaged resistors, the transistors would need to be in good shape, and the transformer would have to be undamaged.
Battery voltage on that last run never went over the mid 13's.