I have Wilkinson's differential in my 74 Euro Pantera and it is working well. It really improved my 50 year old transaxle by reducing slop (kind of like replacing a worn out motorcycle chain). It has 70% locking which improves traction when launching and in corners. It was the only change made to the transaxle and was not difficult to install. I will probably get more done to the transaxle later on. Here is a photo of Wilkinson's differential installed in my transaxle. My original ring and pinion were retained.
I also have his synchros, tall 5th gear, and bearings in another Pantera. It is a 72 Pantera Pre L and all is well. Here is a photo from that project.
