I have had two customers with 2006 Pro V2's. They both said that the factory system was awesome (filled and drained quick) but the boat needed about 500lbs. in the bow to shape the wake and improve the transition. For wakesurfing add between 400lbs. to 700lbs. in the rear locker. I think you will have some space issues. What are the measurements in your rear locker?
I think one guy used the Fly High Side sacs in the bow and a Fly High V Drive Surf Sac in the locker. The other used Skylon Fat buddies in the bow. Hopefully this helps.
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