I measured with the pulleys on as well. I measured from the pulley face where it sits on the pump to the rad. I have a spacer on mine to put the fan into the shroud.
I'll have to see on mine, I think if I put the MP unit on without the spacer the fan will sit just about in the same spot (1/2 in and 1/2 out of the shroud) but the clutch will be about 2 inches from the rad surface.