It could be you thermostat Have you have already checked oil level, and/ot changed oil recently Exaust restrictions can cause overheating
Blown head gasket?
You may possibly have air in the system. Or your thermostat is not opening and closing properly. Double check that it was put on correctly. It wouldn't hurt to call a mechanic. From personal experience, I find I get better answers from neighborhood mechanics, than dealerships.
I replaced my thermostat recently. Try Askarepairtech.com. They have lots of them and they have good pricing. Give them a look.
i need an answer
Thermostat stuck open. Replace.
First check the water level. Low level will not get to the heater core. Change the thermostat. If you recently changed the thermostat, bleed the coolant system.
I did an 88 recently. facing the engine it is on the left. Follow the hose from the radiator.
You need to make sure that your radiator fan is working properly. Some are fixed, some have a clutch that engages them when the engine heats up. Watch your fan when the engine is hot to see if it functions correctly.
Yes, Mike has toured as recently as 2012, and is still recording and occasionally producing.