Temp sending unit location 1969 SRL311

[williecnote]

Does anyone have a picture of where the temp sending unit is located on a 69 SRL311?

[Gregs672000]

All of them are located where the upper radiator hose connects to the engine, at the head.

[FergO2k]

Right.
Single wire connection right at the “knuckle” of the coolant flow elbow on passenger side of the head.
It depends on the elbow gasket having a staple in the rubber to provide the ground.

Sorry for the irreverence, but I always preferred a numeric approach to knowing engine temp, so I got a triple gauge set (Equus) from AutoZone and it turned out it came with like 16 adaptors, and one of them was perfect threads.

So I now run an alternate, secondary gauge. This also allowed me to run a voltmeter as well as an ammeter. (My crude brain understands this better. Me and electrons never saw eye-to-eye.)