AMX1397 helped me out with a center housing section,yoke and 327 gearing. Rob with the wavetrax and Rudy with the computer ratio mod. Devin with the bearings and install. They all worked well together but the rear end was shipped all over the USA. There was a huge take off improvment with the 327 with wavetrax over the 307 with wavetrax. I can only imagine how much faster the take off would be with a 346 gear with wavetrax. AMX1397(Jim) is the only one I know of that's making the 346 gear happen for us. Squirrel Crusher