* Fabricate custom engine mounts: The existing Fiero mounts won't work.
* Modify or replace the firewall: The 350 is much wider and taller than the Fiero's iron-block four-cylinder or V6 options.
* Address clearance issues: You'll likely need to modify or remove parts of the bodywork, possibly including the inner fenders and possibly even the floorpans.
* Consider transmission compatibility: The Camaro's transmission may not bolt directly to the Fiero's differential or transmission tunnel. You'll likely need a custom driveshaft.
* Cooling system modifications: The Fiero's cooling system is not designed for a V8, and you'll likely need a larger radiator and different fan setup.
* Exhaust system fabrication: A completely custom exhaust system will be required.
While some people have attempted this swap, it's far from a straightforward bolt-in project. It's a major undertaking requiring significant fabrication, welding, and mechanical expertise. It's much easier and more practical to use a smaller V8 (like a small-block Chevy, properly prepared) or a different engine altogether.
