Autometer temp gauge install question

[alwayzbroken]

Where is the best place to install the sending unit for my mechanical autometer temp gauge on my 1992 22re? Every coolant port that I can see has a sensor in it that is probably necessary. Does anybody know of any coolant port plugs that are not in use somewhere on the block that I can screw the temp sender for the gauge into? Thanks 

[dirtchicken]

Drill and tap the thermostat housing for the sender.

[alwayzbroken]

Drill and tap the thermostat housing for the sender.

That sounds like a lot of work.

[79coyotefrg]

there  should be  a plug  in a hole  on the intake SOMEWHERE