As most people know with the 41-47 commodore 6 and super six they used bronze bushings instead of needle bearings from factory. We are machining these housing to accept roller bearings. You can contact me by email at russmaas@fontier.com if you like to send me your housing. You got two options 1:send me your box dissembled and we will machine and install new roller bearing and provide a seal$175.00 2. Same as 1 but box and shaft complete and we will set end play and shim the shaft and install seal $225.00.