I was considering the bottom but the only convenient spot is the stopcock.

Hmmm.

_________________
Sweet Emotion

Some ideas
I havent done this yet but I am thinking about it.
In summit they sell " in line " meaning in hose drain fittings.
I was thinking that a sesor could be fitted in one of those.
Of course if one had access to a welder a bung could be fitted in a pice
of properly sized exhaust pipe. Give the inside of the pipe a good coat of
paint and it should last for a long time.

I have had electric fans on my D300 for a while, one from a taurus and a
smaller one from a sentra. both pulling, hard wired to toggle switches.
It works good to cool (when I remember to turn them on) a 360/NP435
utility bed truck no matter how heavy the load. Most everything is stock
about the 360 and it is fairly worn out.

Just some ideas

_________________
85 D150 318
85 D350 360
85 Ramcharger was 318
77 Plym Volare 225 904 (derby car)
66 D100 225 3spd
64 D100 225 3spd
81 D100 225 727
90 shadow 2.2 5spd
92 shadow 2.2 5spd
http://www.freewebs.com/ramcharger/