Turns out mine was the same way, HOWEVER, this is remedied by losening the bolts between the two halves of the housing, removing the nut for the front pully, and turning the two halves, so that the bolt hole that is on the back lines up with the bracket that is on the truck.
weirder thing is that its about 5mm too short, so 3 washers are needed for a tight install.
Its in, all bolts tightened down, and pumping out juice nicely.