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Can you put a 305 engine in 1989 Chevy Suburban if it has 350?

Yes, you can put a 305 engine in a 1989 Chevy Suburban that originally had a 350, but it will require some work and considerations. Both engines are small-block Chevys, sharing the same basic bolt pattern and many other components. However, there will be some differences that require attention:

* Mounts: While the engine mounts are generally in the same location, there might be slight variations requiring modification or using different mounts.

* Wiring Harness: The wiring harness for the 305 might be different, requiring modification or replacement. You'll likely need to adapt the harness to match your Suburban's existing system.

* Exhaust System: The exhaust manifolds or headers might need to be changed to fit the 305.

* Transmission: If the transmission is compatible with both engines (and most likely it is if it's a TH700R4 or TH400), then you're good. But, double-check compatibility.

* Computer Control: The engine control system (ECU) will likely need to be changed or reprogrammed to match the 305.

* Accessories: Power steering pump, alternator, and other accessories might bolt up, but check for compatibility.

In short, it's *doable*, but it's not a simple drop-in swap. You'll need some mechanical knowledge and potentially some fabrication skills. Expect to spend time and money on adapting various components to make it work correctly. Consult a repair manual specific to your Suburban and the 305 engine before starting the project.

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