Wow, I can't help you here. I do know there are several different converters available/used depending on the vehicle based on, speed, towing, high angle, etc. etc.
I rumbled through the 100's of business cards in my pouch here and came up with someone who might be able to answer your question.
High Impact Transmission & Gear
1-888-898-4331
Website:
http://high-impact.net/transmission_and_gear/Give em' a call...it's toll free
BTW- They are in California so take the time difference in account. Or just email them through their website.