I don't know if the mounts are different, but if they are, you should be able to just swap mount arms from one engine to the next (aluminum arm on the side of the block). The other thing to be aware of is the flywheel balance. Make sure that if the flywheel on either engine is not neutrally balanced, that the offset be applied to the one going on. Unless there is some obvious reason not to use the manual tranny, I would just swap the engine tranny as a combo (not sure about clutch peddle mounting though). Overall should be pretty straight forward.

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