Repairing block pallets

We have an opportunity to repair block pallets for the beverage industry but dont know how to save the good top & bottom deck boards when un-nailing the defective unit or better still, how can we construct ( type of fasteners,ie:nails, studs, staples, glue,etc) this pallet so that it becomes a repairable pallet??Please call me at 314-381-3030 if you have a sound solution/s. Thank You Very Much!!