Cantfind the temperatuesensor onmy 87 pup

Sounds like an ignition switch,,,,could be a main fuse problem

Sounds like multiple problems. rev up and down at idle sounds like vacuum leak. shutting down while driving sounds like loose wire in the ignition system or possibly in the fuel pump.

It can still be the fuel pump.the pump could be getting hot and not working. If u let it set for awhile and cool down it will start. You need to do a fuel pressure test it should read between 40 and 50 psi. Let it run for awhile and see if the pressure drops. If so I would replace the pump

Government mandates all vehicles can run on 87 octane. For that vehicle it would be just fine. I de rec. To do a tank of 87 check milge you are getting. The run a tank of 89 check milges and calculate the differnce milge and cost. I have found with some vehicle the extra 1$ or 2$ you may spend on 89 will get you 2 -3 mile more per gallon.

Sounds like a bad connection/contact in the cluster assy.

Relay

6 Degrees
Application:
With automatic transmission

Note :
Before top dead center
*Set at warm idle speed (900 RPM)
*Disconnect & plug vacuum hose at electronic spark
control computer
*Transmission in neutral (parking brake engaged)
*All accessories off
and with a timing light loosen the dizzy or distributor and turn it till it runs smooth or at 6 degrees

gas line in fuel tank stopped up- blow out with compressed air

The ignition module in located in the distributor under the cap. Might contribute to the stalling ,control spark to spark plugs, timming advance etc, but has no bearing on overheating. Hope this helps.

the only way to get your compression back where it should be is changing the rings...and while you're at it; fully service the engine