A note on Ford small block water pumps , A small block V-8 water pump from a Early Bronco up to 1977 or a small block water pump up to 1969 is shorter than a passenger car or truck water pump from 1970 on , the bottom hose is on the passenger side.
A Explorer 5.O is even be shorter but you would need to use the whole serpentine set up and timing cover and a electric fuel pump , bottom hose is on drivers side.
Going back even farther the 1964 Hi-Po 289 had a short water pump and timing cover.
I am going through the whole thing on my 75 bronco , 351w, 4 core radiator and a york on board air set up , 3 v-belts !!