I am aware of patrick's..I'll look up Mothertrucker's. A guy here who worked for GM and then a local transmission shop says there is a Richmond kit that will do it, but your feedback will help me stay out of trouble on this one. The truck is a 51 3100. The 4 speed is an original out of a 48 truck. As far as I know, the rear end is original to the truck.
Dave
