Here's a breakdown of the challenges:
* Engine Mounts: The biggest hurdle is fabricating or sourcing engine mounts. The Chevy small-block and the Pontiac's original engine bay are different, requiring custom mounts. This often involves welding, fabrication skills, and potentially some creative problem-solving.
* Transmission: You'll need a transmission that's compatible with both the Chevy 350 and the Pontiac's drivetrain. This might involve adapting the transmission, driveshaft, and rear end.
* Exhaust System: The exhaust system will need to be custom-fabricated to fit the new engine.
* Wiring Harness: The wiring harness for the Chevy engine will likely be incompatible with the Pontiac's system, requiring significant modification or replacement.
* Cooling System: You might need to modify the cooling system, potentially including the radiator and hoses, to ensure proper cooling for the Chevy 350.
* Steering and Suspension: Depending on the size and accessories of the Chevy 350 (like aftermarket intake manifolds), you might encounter clearance issues with the steering components and suspension.
* Overall Complexity: This is a significant project involving many different mechanical systems. You'll need a good understanding of automotive mechanics to troubleshoot and resolve problems that inevitably arise.
In short: While many people have successfully performed this swap, it's not a simple bolt-in affair. If you lack significant experience, it's best to seek help from experienced mechanics or utilize a reputable shop. Expect to invest substantial time and money. Consider the alternative of a more straightforward engine swap within the Pontiac family if you're less experienced.
