3836848 - 1956-1963 head casting code
What is the date casting code - see link below - that code is inside/under the valve cover)?

3769716 - 1958-1962 235 block casting code
Date casting code: L 13 1
L = 12 = December
13 = 13th day
1 = 1961 (1951 was a low pressure block - it would not be able to be used with an "848" head)

http://www.1954advance-design.com/Stovebolt-engine/casting-numbers.html
http://www.1954advance-design.com/Web%20images/casting-code-photos/codes-ser-nums.html