These adapter mount allow you to install a tunnel (syncro) trans into a '59 or earlier bus, as well as a '53 or earlier bug and even an early single mount 356. After years of modifying other mounts to work with a bus nose cone we made one that works out of the box. Smaller 10mm mounting stud holes make this a direct bolt on for early bugs and 356's. Drill it out (or let us know and we will before shipping) to 12mm and it'll work in your bus application. Re-shaped ear clears the bus nose cone without any grinding as well. Thanks for looking http