Well I finally got around to taking some pics of my install. I used some 3/16 brake line with 1/8th pipe adaptors to a 1/8th pipe FFM Tee. Then -3 steel braided line into the cab.
After 10000+ miles on my and the rest of my teams off road race trucks we've never had a leak on any of our mechanical gauges, the only failures we've had were electric senders going bad.Any reason you chose a mechanical oil pressure gauge over an electrical gauge ? I would think teeing for the sending unit, and running a wire inside would be easier...(and if the off-road vibration causes that gauge to leak in the vehicle, it'll be a mess :lol