I've been getting a steady leak from the oil pressure sending tap since I've owned my 80 SD33T. Well after repeated cycles of loosening and tightening to properly seal it I finally snapped the elbow off. I have a spare SD33T engine sitting in a Traveler with a bad transmission so I borrowed it and the original sender- PO disconnected the original and put in a mechanical aftermarket gauge. It's leaking like a sieve (no surprise). This makes 2 of 4 BPST fittings that I've snapped off (the other was the supply for the Turbo) however I'm not interested in tapping any of them to NPT until I pull the engine for a complete overhaul next winter. Replacing the turbo supply was a nightmare of trial and error with the NAPA parts counter- they have some BPST treaded fittings in their system but they're not properly labeled in the system (the one I got last time is listed as discontinued now and was listed as 'special NPT'). Does anyone have a good source for BSPT fittings? Obviously I'd like a 1/4 BSPT 45d male to 1/4 or 1/8 NPT (male or female). but really anything that gets me from that f----ing BSPT outlet to something more common will work. Also after having the original gauge working for the last couple of weeks I'm kinda leaning towards tee-ing into that port and running both a mechanical and the original. Does anyone know if there's a source for that original sender or a solid state one that is compatible? Does anyone have thoughts on using the EGR trigger port as a second temp sender because I'm thinking I'd like run dual gauges for engine temp too (old voltmeter gauge/calibrated thermometer)?