So I did give this a check too since you mentioned, the resistance from ground at box to ground at battery is about 0.9 ohms, i checked the other grounds to compare they also are around 0.9 ohmYes Yes My bad
Sorry about that I was wrong No wire to ground from the Coil
But from TCI Thank you Jim..
Please check if the electronic Igniter looks like that
3 rd from left or 2 d from left
Is there a black wire
If so measure the resistance from the Igniter black wire to the minus on the battery ignition off
That black shall have a good connection. Between igniter and Minus on battery..
But sort out the caps and spark plugs first.
View attachment 214667
the ground at the box and ground at battery Mach th