Re: What is the correct oil sending unit?
The one for the gauge has a single tab on it, BUT make sure you get one for the gauge and not the idiot lite version, both have a single tab. The dual tab one is used to transfer 12V to the electric choke when there is oil pressure and also causes the choke light to come on when there is low oil pressure.
This is mine on a 6 cylinder, but it is the same on a V8. I don't have any from my old truck with V8 because we eliminated the 2-prong one and ran our own 12V for the Carb choke.
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