Pontiac 3 Blade Temperature Sending Switch, used on some pontiacs 1970-up.V8, very hard to find, nice used condition, $60.+shipping or buy two for $100.+shipping., only have a few,.
starting in 72 it screws into the pass. side head. 70-71 screws into front of intake.
email if interested or if you have questions.
also have 72 thermal emission switch listed on PY.
thepontiacman@yahoo.com