CT engine.
We've dropped the fuel tank to check and repair, and have noticed that as well as having the carb return pipe on the tank blanked off with an original VW part (as per CU), the clutch is hydraulic not cable as it should be on a CT. We also aren't sure how a CT is running with the fuel return blanked off.
My logbook says it is a 1970cc, and we assumed the previous owner was planning to put a CU in, but the blanked tank and hydraulic clutch suggest it came out of ther factory as a CU, which was replaced by a CT, strange as though it may seem.
How can we identify the gearbox please? We can see the numbers 26 52
E D I T: it is a DK

So this must mean the van was originally a CU and has been swapped for a CT, but with the original gearbox?.
How could I tell if the CT had been upgraded in some way? Is this possible?
Thanks
Pete