* Engine Mounts: The 350's mounting points won't align with the V6's. You'll need motor mounts specifically designed for a small block Chevy in a G-body (the Cutlass platform). These are readily available aftermarket.
* Transmission: The transmission will likely need to be replaced or adapted. The V6 likely used a different transmission than a typical 350. You'll need to consider the bellhousing compatibility between the 350 and your chosen transmission (e.g., TH350, TH700R4, 700R4, etc.). This often necessitates a new transmission crossmember.
* Exhaust System: The exhaust manifolds or headers for the V6 won't fit a 350. You'll need a new exhaust system designed for the 350 and the G-body chassis.
* Wiring Harness: The wiring harness for the V6 won't be compatible with the 350. You may need a new harness or significant rewiring, possibly including an aftermarket engine control system.
* Cooling System: The radiator and possibly the cooling fan may need to be upgraded to handle the increased heat output of the 350.
* Driveshaft: The driveshaft length might need adjustment to accommodate the different transmission and engine combination.
* Brakes: A more powerful engine may require upgraded brakes for better stopping power.
* Fuel System: The fuel pump and fuel lines might need to be upgraded to support the 350.
* Steering: Depending on the power of the 350, you might need to look at upgraded steering components.
In short, while the swap is possible and quite common amongst car enthusiasts, it's a significant undertaking requiring mechanical skills, specialized tools, and a fair amount of time and money. You should be prepared for unforeseen challenges and potential additional expenses. It's recommended to consult with experienced mechanics or online forums dedicated to G-body swaps for detailed information and guidance.
