My sin # on my engine is 0196073F56U this one is a 1956 235 ci truck engine and is from the 4000 -6000and the U says it is a Load master. If you go to
http://chevy.oldcarmanualproject.com/models/engine.htm

you might find what you are looking for.
The one below is the main site where there is lots of more info http://chevy.oldcarmanualproject.com/

I hope this helps

1953 1-Ton Canadian Model 1434
In the Stovebolt Gallery
More pix on Photobucket