Start with the basics if you haven't already:

Plugs/wires/cap/rotor

Replace air filter

Set engine timing to 5 deg. btdc

Test Fuel pump and replace the filter

Check/replace ignition coil

Check all Engine Vacuum lines for leaks

Adjust air/fuel mixture

FAN - Replace temp. sending uniit on top of thermostat housing.

Do all of the above and she'll run much better.

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