The systems off the early 90's 4.3, 5.0 and 5.7 will all interchange.
However keep in mind to find a complete system, don't attempt to get several sets and try to make it work. A power steering pulley remover is needed if you plan to take the brackets without the pump itself. However if you want to take the pump also it can be removed all in one piece. Also pay attention to the water pump pulley. A smooth pulley is reverse rotation, the ribbed pulley is standard rotation. Same goes for the fan. That's just a tip to make sure you know the differences, as if you use a standard direction pump on a reverse rotation system it will run hot. Lastly, when installing it, make sure you snug the brackets down good with perferably bolts with shouldered heads.