Will the motor mounts from a 351 Cleveland work with a 351 windsor?

Answer 1

Yes. There are many major differences between the 351W and 351C, but mounting and bellhousings are generally interchangeable. Differences include water pump and water routing through the block, timing chain cover, the 351W crankshaft has significantly larger bearings (3 inch mains), the 351W had non-canted wedge heads while the 351C has canted valve heads with different water outlets (they will interchange with suitable special aftermarket intake manifolds), block deck heights, and so on. While the 351C was initially favored as a high performance engine, the valves and ports were later found to be too large even for high performance applications. The current NASCAR heads have less valve cant, smaller chambers, and smaller ports with higher velocity than standard 351C heads had. For most applications like trucks or passanger cars, the 351W is a vastly superior engine with better fuel economy and more torque and power. A swap from a 351C to a 351W is a good modification for a street engine, or even a high performance engine.