If this combo of PS pump, SWP and pulleys has run as a unit before you shouldn't have any problems once the 3-groove pulley comes in. If not, just be sure the PS pump isn't for a LWP set up.
BTW, there's an add-on factory outer "3rd" groove pulley that was used by Chevy. Works on a 1- or 2-groove factory-type pulley... but you already have your 3-groove pulley ordered, so moot point.
Last edited by cobalt327; 01-10-2013 at 10:44 PM.