Wolfgang,
Here are my guesses - someone will correct me, if I am wrong:
3836848 GM 21 driver side - this is a 1956-62 235 head
- on the head B59 848 passenger side - February, 5, 1959
- on the motor block near by the ignition control 3235793 small numbers - I think there should be some letters there, also? Were these numbers pressed into the ledge to the rear of where the distributor enters the block, or are these numbers in the casting, between the distributor and the road-draft tube?
- on the block CON 3 A194 January, 19, 1954 - this looks possible because the water pump is mounted high on the block, as was the case in 1954 but not in 1959
So, my guess is that you have high compression head on an older 1954 block - not a bad combination.
Tim