The 1966 and earlier Volkswagens came stock with a 6 Volt, 180mm Clutch and Flywheel. From 1967 on, it switched to a 12 Volt, 200mm configuration.
While you have your transmission out of your vehicle, we suggest replacing or repairing other drive train parts that will now be easier to access and work with. Having well secured and fully greased Axle Boots will keep your Volkswagen running smooth. Starters and shifters also commonly need to be replaced when doing a transmission overhaul.