pulley questions

[easyrider]

I posted a few days ago about my alt. bracket not lining up with pulleys if I used the stock alt. bracket. I was told that my having the long water pump was the problem. If I change to the short water pump will I be able to use the same pulleys that I have or will I have to change the pulleys too? One or two or all pulleys? With truck taken down now, this would be the time to do it if I am going to change anything, but I don't want to creat more problems for myself when I am just trying to use the stock alt. mount and can go another direction. Also, if the pulleys won't line up can they be spaced? Thanks in advance for the help.