"If it has a tall side cover with 4 bolt valve cover it is a babbet con rod bearing, low pressure 235."
Is there a low-pressure 235 block that will work with a non-adapted head that uses a 4-screw valve cover?
"But if you have both the short side cover and the four bolts holding the valve cover, does that mean full pressure?"
Yes
Big Tee's link to a photo of the valve cover and side cover combination is what one would find on all 1950-1953 235 engines (car and truck; hydraulic & mechanical lifters).
As described by others above, 1953 was an odd year in which the hydraulic-lifter 235 automobile engine had the short side-cover, the two-bolt valve-cover, and a higher-pressure lubrication system (like all 54-62 235 engines, which had short side covers and 4-screw valve covers).
