Tonight I ran a second application through the Mystique. It smoked as much as it did the first time. As before, I couldn't even see to drive for a while.
After the second application, it does seem to be running smoother. When I give it a lot of gas, especially in fifth gear at low rpms, it seems to be much smoother. I don't know why this would be, but the engine doesn't seem to vibrate as much at the low rpms as it used to do.
With all the smoke that I got out both times, I figure there's more inside where that came from. It's hard to believe there was enough "something" inside the engine to produce all that smoke.