it wouldn't decrease oil pressure, because it's not changing the size of the inlet and outlet holes.

i ran some of the big filters on my 22RE but it was too much of a hassle. i don't have A/C either.

'79 sport 4x4 longbed <img src="/forums/images/graemlins/smile.gif" alt="" />
20/22R hybrid with EB's OS valves, 268c cam, offy intake, weber 32/36, thorley header, 5 speed swap, 34" LTBs, downey 3" springs, marlin hysteer, 4.88s and locked

'91 4x4 shortbed
22R-E, W56, the dd!