To be certain, you should:
* Consult your owner's manual: This is the best resource for the exact location.
* Look at a wiring diagram: A wiring diagram for your specific engine will show the coil's location. These are often available online.
* Use a visual guide: Search online for "1976 Chevy truck ignition coil location [engine size]" to find pictures of the coil's location on similar trucks.
Remember to always disconnect the negative battery terminal before working near any ignition components.