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Will a 305 motor from 1986 elcamino fit in Monte Carlo ss?

A 1986 El Camino's 305 cubic inch small-block Chevy engine *should* fit in a Monte Carlo SS of the same year, but it's not a guaranteed drop-in swap. While both cars used the same generation of GM chassis, there might be some differences in the engine bay's specifics (like accessory placement, exhaust routing, or clearance issues with the body).

You'll likely need to address some aspects, possibly including:

* Motor Mounts: The motor mounts might not be identical and may require modification or replacement.

* Wiring Harness: The wiring harness from the El Camino may need modifications to match the Monte Carlo's system.

* Exhaust System: The exhaust system will probably need to be adapted or replaced to fit the Monte Carlo.

* Transmission: Ensure your transmission is compatible. If you're swapping the entire drivetrain, this is less of a concern.

* Accessory Drive: Power steering, alternator, and other accessories might require some adjustments to properly align.

In short: It's *feasible*, but not a simple bolt-in job. You should expect some fabrication and modification work. Experienced mechanics can usually handle this, but it's not a beginner project.