Merry Christmas to all my fellow Hot Rodders........ from the Great White North

........I am wondering who can tell me the difference in the depth between a short water pump and a long water pump........I am considering switching to a long pump to hopefully alleviate a potential cooling problem by having my cooling fan projected closer to the radiator.......I am hoping not to have to install a fan shroud..... as I have a slightly restricted space ......right now I am running with a 19" clutch fan.......anyone out there ever had a similar problem or......would you have an ideal suggestion.........Thanks

for taking time to read my inquiry.........Chevy......!