No one seems to be doing a kit. MV autos does a valve body mod for $375. I think the people who know these box's are keeping the info to themselvs. But that buisness.
Anyways, it's a little box of electronic wizardry that fully manualises the box and ups the solenoide points for sharper shifts i believe? Give MV a call for details and ask for a price.....which i'll do much cheaper of course