I do have an air compressor but no leak down kit. It’s easy enough to retry the compression test with a squirt of oil in 2 and 4 that I’ll do that first.

Edit: I did try multiple runs on cylinders 2 and 4, so it shouldn’t be a gauge seating issue. Hard to believe that the rings could be so dry that they don’t seal worth a damn anymore but testing again is not a huge endeavor.