A 52 is the same as a 47 and slightly longer. In a W body of your year, I'm unsure of clearances etc. On the 97+ W bodies, the clearance between oil filter adapter and frame is a little tight depending on the shape of the motor mount. I've found (97+) that the 52 is usually a little longer than my liking due to the clearance.
Nevermind, I figured it out. The PF52 is the longer version. It came on older 4.3L engines and early LQ1'*. If you want to put one on your car, you can ask for an oil filter for a 1992 Chevy Lumina Z34 with the 3.4L DOHC engine.
Edit, just noticed your reply. Thanks for the info. The L27 has a lot of clearance for a longer filter.
Awesome find. I found out that my local O' Reilly boys know their stuff. I wanted a longer filter as well, but didn't know part numbers. So I told them what I had and said I wanted a longer version of what the computer pulls up. Turns out the guy just looked at the number that came up and said yeah no problem, and grabbed exactly what I wanted.