So, as everyone does, I took a stab at trying to identify the engine. It looks like it is a 1954 235 (according to this website:
Engine Serial identification).
I've attached some photos from the engine. Two are from near the starter motor, and then the last one is closer to the dipstick and matches info on the link referenced above.
Anyone disagree, or does it look like I have a 1954 235 "regular" engine in my 1950 truck?