distributor guy,
Do you have documentation regarding what is right?
What wrong information has been posted above?
The Engine Serial Number, 55F1017N, does not match the format of a GM code (links to GM codes for 1955 cars/trucks are given in a post above).
3836850 is a 1956-1963 261 head code.
Here is one of the lists of 261 casting codes on the Internet. As posted by others above, we need the block casting code to confirm a 235 or a 261. Locations have also been posted above.
