Ruf is rear springs up front.
Generally people make custom front leaf packs, with generally at least the two main leafs from the back of the truck. Ive always heard people happy to use the rear springs from an 84-88 pickup, etc.
63" out back is 63" chevy leaf springs in the rear. This is common, and so is ford f-150 springs. They both net about the same ammount of lift i think, and can be found at junkyards for cheap.
You are going to want high-steer for sure.