If anyone should use the Mopar A833 overdrive box; just remember, that the m/s gear only has 20 teeth on it, and no more than 2 or 3 of them are transmitting power to the cluster. In my experience, they will not take ANY abuse, and then, Zing! / you are walking. And one out of three times the broken teeth take out at least one other gear; in my case the input gear, and that cost me a tow-job, in addition to another gearset.
I urge you NOT to run a CF-II disc, cuz it shows no mercy.
After 4 years and three broken boxes, I gave it up.