The 51-54 cars have a unique motor mount setup that the other years/applications never had.
It is possible to use the other engines, but you would need to either convert the car over to the front mounting setup like on the 49-50, or if using a 58-62 engine, you could make an adapter plate to alow the use of the original location motor mounts.
When mounting one of these motors by the front motor plate, just drill the 2 holes. Changing the plate itself requires tearing half the engine apart (both engines).
The easiest way to go would be to find a 53 powerglide or any '54 car engine. That way you get full pressure oiling and it's a "bolt-in" deal. When using the 55-62 engines, the waterpump requires shortening or an adapter plate to re-use the earlier style pump.