1. Engine Bay Preparation:
* Removal of the Oldsmobile Engine and Transmission: This is the first step. You'll need to disconnect all the components (wiring harness, fuel lines, cooling system, etc.) before removing the engine and transmission as one unit.
* Motor Mounts: The SBC 350's motor mounts won't fit the Cutlass's frame. You'll need to purchase and install motor mounts designed for a SBC swap into a GM A-body (which the Cutlass is). These are typically custom-made or aftermarket mounts.
* Steering: The SBC 350 may interfere with the steering components. You might need to modify the steering linkage or even use a different steering shaft.
* Exhaust System: The existing exhaust system won't work. You'll need a custom exhaust system fabricated to fit the SBC 350. Headers are highly recommended for better clearance and performance.
* Transmission: The original Cutlass transmission won't directly bolt to the SBC 350. You'll need a compatible transmission (e.g., TH350, TH400, 700R4 automatic, or a T5 or Tremec manual) and the necessary adapter plate if the bellhousing bolt patterns don't match.
2. Engine Components and Accessories:
* Engine Accessories: The SBC 350 will require its own alternator, power steering pump (if applicable), and other accessories. You'll need to ensure these are properly mounted and plumbed.
* Wiring Harness: The Oldsmobile wiring harness won't be compatible. You will either need to adapt the existing harness or get a custom harness designed for a SBC in a GM A-body.
* Fuel System: The fuel system may need modifications or replacement to accommodate the SBC 350. This might involve fuel lines, a fuel pump, and potentially a different fuel filter.
* Cooling System: You'll likely need to use a different radiator and possibly hoses, as the original system might not be compatible with the SBC 350.
3. Other Considerations:
* Computer/Electronic Controls: Depending on the year of the SBC 350 (carbureted or fuel-injected), you'll need to address the engine control system. A carbureted engine is simpler to integrate but may not be as efficient as a fuel-injected system.
* Driveshaft: You might need a custom driveshaft or modification of the existing one to accommodate the new transmission.
* Brakes: While not directly related to the engine swap, you might consider upgrading the braking system to handle the potentially increased power of the SBC 350.
4. Professional Help:
Unless you have extensive experience with engine swaps and automotive mechanics, it's strongly recommended you seek professional help. This is a complex project with many potential pitfalls. A knowledgeable mechanic can ensure the job is done correctly, safely, and efficiently.
In summary: Swapping an SBC 350 into a 1972 Oldsmobile Cutlass is a substantial project requiring significant mechanical knowledge, tools, and parts. It's not a simple weekend project and can be expensive if not done properly. Carefully weigh the pros and cons, and consider the cost versus buying a car already equipped with the desired engine.
