Most Interchangeable (Generally 1967-1987):
* Many Body Parts: Exterior sheet metal (fenders, hoods, doors) are often similar across this span, though there might be minor variations requiring some adjustment. You'll find the most consistent interchangeability within the 1973-1987 period, however.
* Some Mechanical Parts: Certain engine and chassis components, especially for similar engine types, might be interchangeable. However, you'll need to verify specific part numbers.
Less Interchangeable (or requiring more careful checking):
* Interior Parts: Dash components, seats, door panels, and other interior pieces vary more significantly year to year. While some parts might fit, others might require modifications or won't work at all.
* Electrical Systems: Wiring harnesses and electrical components changed over time. Direct swaps aren't always possible.
* Suspension and Steering: While some parts *might* share similarities, it's not guaranteed. Double-check part numbers. Brake systems can also be different.
* Specific Engine Parts: While the engine type (e.g., a small-block 350) might be consistent, internal components, intake manifolds, and other parts can vary by year.
What to Do:
1. Identify your specific C10's engine and trim level. This is crucial for accurate part identification.
2. Use online parts catalogs: Websites like RockAuto, Summit Racing, and others let you search by year and model. They'll show you which parts are compatible.
3. Check part numbers: Always compare the part numbers of the original part with the potential replacement part.
4. Consult forums and online communities: Classic Chevy C10 forums are great resources. People there have a lot of experience with swaps and modifications, and can give you specific advice.
In short: While some parts are fairly interchangeable across the late 1960s to mid-1980s, it's not a guarantee. Always double-check using part numbers and consult resources before buying any replacement parts for your 1986 Chevy C10. Focusing on the 1973-1987 range gives you the best chance of finding compatible components.
