I spluged and picked up an Autometer 2 5/8 Mech Oil Pressure gauge.
I'm thinking of total indestuctability on installation. Following Charlies suggest , I'm cranking it up a bit.
I'm thinking steel brake lines and hoses. I got a steel T with metric somekinda threads off a Toyota. The threads on the guage are ?what/ ,, but a montero brake hose screws on preety snuge. The fitting on the filter housing is BTPT ? . A 1/8 NPT tap I think might stip the treads. NAPA has the B. adapter,,,2 fitting are $36 . More later...

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.