The 1953 model year cars had splash oil with standard transmissions, and the 235 pressure lube with Powerglide. I put one of those is my second car, a 1952 Deluxe standard. (boy, I wish I had that one back).
I think all trucks still had splash in '53.
Everything went to pressure lube in '54.
But, 53 and 54 pressure lube still had shimmed mains I think.