* Year of the 350: The year and specific model of the 350 will impact fitment. Earlier 350s might require modifications to the engine mounts or accessories to fit properly. Later model 350s (especially those from the late '80s and beyond) might be easier to integrate, depending on their accessories.
* Engine Accessories: The alternator, power steering pump, AC compressor, and intake manifold will all need to be compatible with the IROC-Z's existing setup or replaced with compatible parts. The position of these accessories varies between different 350 engine builds.
* Transmission: You'll need a transmission that's compatible with both the 350 and the IROC-Z's drivetrain. This might require an adapter plate or other modifications. The transmission's bellhousing will need to match the engine.
* Exhaust System: The exhaust manifolds or headers will likely need to be replaced or modified to fit the IROC-Z's chassis.
* Wiring Harness: The engine's wiring harness might need to be adapted or replaced to work with the IROC-Z's electrical system.
* Computer/ECU: Depending on the year of the 350, you might need to deal with the engine's computer system and its compatibility with the IROC-Z's system. This is a complex aspect and often requires significant modifications or a stand-alone engine management system.
In short: While physically possible, swapping in a 350 into an '86 IROC-Z is a significant undertaking requiring mechanical expertise and potentially substantial modification work. It's not a straightforward drop-in replacement. You should research specific engine configurations and consult with experienced mechanics before attempting this swap.
