273 water pump questions

Does anyone know if the length (fan side) of the water pump is the same.

In other words- can you swap the two pumps and the fan is exactly the same distance from the radiator?
I have a 74 318 in my 66 barracuda. It is really tight with the Champion radiator with the correct outlets made for this combination. I’m trying to see if water pump is issue or radiator is closer to engine than a factory one should be.

Sorry for taking this thread- sending it back. Lol!