Electric ones can be 100% accurate, after all we all trust the CTS, to read correctly and keep out fuelling right which works on EXACTLY the same principle, ie thermistor.
I like and only use lecky ones due to there being NO way a mechanical oil pipe supply to the gauge can break!!
2wd can be used with sandwich plate AND temp and pressure sender if you want, otherwise just buy suitable extension from existing pressure switch hole.
I have a drilled fitting on my sump for a temp sender, as well as on oil cooler, on the nearside, loads of room there.
If you send me a sump plug I'll drill and tap it 1/8 NPT-27 for you FOC, also got 1/4 NPT-20 size taps, this is the pressure switch size used on the YB, also got 5/16 and 3/8 taps in LEFT hand tap as well as right if anyone needs a adjuster rod making up etc.
tabetha