318 Engine stumble

Without doing anything yet. I will say. The car runs pretty good except for the transition is choppy and the backfire out the intake when it’s cold. Either way the timing is off and needs to be sorted.

Also....the backfire when starting the car....sometimes.
I almost would have been satisfied with it. Then worked out the choppy transition with more testing.....

Had I not run the piston stop and checked for 0 I would have never noticed it....
I’ll get some pictures tomorrow and see where the ring to reluctor relationship is.

The upper rpm is very smooth past 2400. I’ve had it to 4500 with no load and it’s smooth. Seems to have decent power wide open but it feels like it’s holding back some. So if the module was hooked up backward. The car would run bad in the upper rpm range?