Oil Pressure Gauge 1985 300CD

[ArkyDoodle]

Recently I had an engine swap performed on my '85 300CD.....The oil pressure line to the OP gauge wasn't hooked up....When they changed the engine it came from a later 300SD which had an electric oil pressure sending unit instead of the straight pressurized oil line to the gauge (like it did originally)......Now the oil line will screw into the hole (where the 300SD's oil pressure sending unit was) but never "bottoms out" --- the oil line is never actually seated (you can push the tube in after it's completely threaded which allows for oil to get around the tube)......SoooOOOOooo at this point, I've either gotta find an adapter which will convert the existing "thru" threads" from the 300SD to a bottom-seated thread or change to an electrical oil pressure gauge.....??