water pump threaded on pulley or bolt on?

[aquaman0001]

Hello,
Does it matter if I have a thread the thread on fan clutch instead of the bolt on? Alldatadiy only gives 1 reference for the water pump. Just want to make sure before I order the pump.
A

[john8662]

You can look at your rig and determine which style you have.

It matters which part you order, although they do the exact same thing, flow the same coolant.

A 99 could have the screw on hub.

J