My current setup is a 1700 type4 engine with standard gearbox (1973). I plan to do a rebuild on the engine and gearbox over the winter and have a very basic question. Firstly, I'd like to increase the capacity (it's a heavy bus doing some high mileages). I have a spare 2 litre crank and will be replacing the barrels and heads so it will be over 2 litre when finished. My question is will my rebuilt existing gearbox take the increased torque OK? (I guess VW designed the six rib 2l gearbox for a reason). If not, what are my options for mating a 2l gearbox to my existing cases regading the cluth assembly, clutch bell housing etc, etc? Any advice appreciated.