1. Engine Compatibility: First, ensure that the 87 350 Chevy engine is compatible with the transmission and drivetrain in your 75 1-ton truck. This includes checking for transmission bolt patterns, transmission type (automatic or manual), and driveshaft compatibility.
2. Engine Mounts: The engine mounts in your 75 1-ton truck may not be suitable for the 87 350 Chevy engine. Custom engine mounts or modifications to the existing mounts may be necessary to ensure proper fitment and support for the new engine.
3. Electrical System: The electrical system in your 75 1-ton truck may need modifications to accommodate the different electrical components and sensors of the 87 350 Chevy engine. This may involve rewiring, adding relays or control modules, and ensuring compatibility with the truck's existing electrical system.
4. Fuel System: The fuel system in your 75 1-ton truck may also require modifications to accommodate the fuel injection system of the 87 350 Chevy engine. This may involve installing a fuel injection pump, fuel lines, and a fuel pressure regulator.
5. Exhaust System: The exhaust system in your 75 1-ton truck may not be compatible with the exhaust manifolds or headers of the 87 350 Chevy engine. Custom exhaust modifications may be necessary to ensure proper fitment and routing of the exhaust system.
6. Cooling System: The cooling system in your 75 1-ton truck may need modifications to accommodate the cooling requirements of the 87 350 Chevy engine. This may involve installing a larger radiator, upgrading the water pump, or modifying the thermostat housing.
7. Driveshaft: The driveshaft in your 75 1-ton truck may need to be modified or replaced to accommodate the different length or position of the 87 350 Chevy engine. Measuring and fabricating a custom driveshaft may be necessary.
8. Computer/ECU: If the 87 350 Chevy engine is fuel-injected, you may need to install the computer and wiring harness from the donor vehicle to properly manage the engine's fuel injection and ignition systems.
It is important to approach this type of engine swap with caution and careful planning. If you are not confident in performing these modifications yourself, it is recommended to seek the assistance of an experienced mechanic or automotive shop. Additionally, local regulations and emissions standards should be taken into consideration when performing engine swaps.
