Will your 1303 1600 engine fit 67 1200 beetle or do you have to change the gearbox aswell?
Yes, the 1303 1600 engine will fit in a 67 1200 Beetle. However, you will need to change the gearbox as well. The 1303 1600 engine has a different bellhousing pattern than the 1200 Beetle engine, so the original gearbox will not bolt up to it. You will need to use a gearbox from a 1303 1600 Beetle or another compatible model.