Are you sure that it is your rev limiter? Could be that your engine is suffering a major failure. Especially with the oil pressure that you are seeing. I would verify that your oil gauge is correct first, if your oil pressure is really that low then that engine needs to be serviced immediately
1992 YJ with 5.0 Ford, M5OD R2 Trans, BW 1356 TC, Ford 8.8 rear axle, sitting on 33 x 12.50 BFG MTs.
Aluminum 3-core rad, Electric fan, 8k winch
-More mods to come-
LSD 8.8, custom dash, front and rear bumpers, extended rear axle, fender mods, etc, etc, etc