I've missed a lot of this post, but on my Stocker, everytime we've had the engine on the dyno with a digital MSD or had a digital MSD in the car, it won't run right. Had a Mopar Mechanical Tach Drive distributor in it and thus couldn't use MSD's trigger wire.

When we put the engine on the dyno, we'd have to take a 7AL-2 and wire it up before the engine would take any kind of load.