GeeVee,
235s were used in cars and trucks in 1955.
ALL 235s in 1955 came with the four bolt valve cover but, over the past 53 years, someone could easily have put the older 2-bolt 216/235 valve cover on the 1955 engine/head.
As I recall, your block number was for a 1955; and, someone posted that it was a car block casting code. I have seen that code listed as a truck casting code in 1955 and 1956.
The engine-block that was used with a Powerglide-equipped car in 1955 was 3702436 (this block was set-up for hydraulic lifters). Thus, it is possible that your block (set-up for mechanical lifters) could have been used in a standard transmission car or in a truck?
Tim
