Wolfgang,
You have a 56-62 235 "848" head. That head was also a replacement head used on 54-62 235s.
If you can provide the other engine codes, we might be able to tell you the exact year of the head and block..
Is the pivot with the bell-crank directly under the carb or more towards the rear of the block? As truckernix suggests, a photo of the bell-crank and where it is in the block would help. It would also help to see a photo of the front of the engine, showing how/where the water pump is bolted to the block.
Tim
