Sensor (oil, temp) issues

[davepl]

I'm having two issues. 1970 402.

a) I cannot for the life of me figure out where the temp gauge sender goes. I know it had one because the gauge didn't work, and I checked its resistance. I just don't remember where it was, have no photo of it, and the assembly manual shows it at the water neck. That I -do- have photos of and it wasn't there.

b) On the oil side, I have the oil pressure tube connected to the center hole of the three that are available above the oil filter on the big block. I cannot, however, seem to thread the idiot light sensor (blue wire) into the little hole. It looks like the same size, but maybe there's paint in it, or it's not a tapered thread, or some difference, or LMC sent me a metric thread sensor. I'm out of ideas.

Similarly, I'm going to have to plug whichever plug hole I don't use, and I don't know what'll fit.

And tips welcome!

[davepl]

Found the temp sensor; machine shop put a square plug in it; usually they'd use a hex pipe plug so I thought the plug was OEM (always there). Then I finally found a photo I had.

If it helps, the oil pressure sender I have appears to be 3/8-24 tapered pipe thread. Still stuck on those two. On my 427/390 it's T'd off to gauges and light, but those cars (from the factory) have one or the other, not both (light and gauge).

[davepl]

Now I'm confused. The truck dash has BRAKE and TEMP lights. No oil light. Maybe the M&H harness doesn't distinguish between gauge and idiot light trucks?