727 Rebuild Blues

Ok. Could this input shaft be junk? It's about 10 thou smaller in the sealing ring area versus where the bushing rides below. I mic'd the new pump & it's the same size in the bushing as the the sealing ring area of the pump. Basically I think there's about 10-12 thou clearance at those sealing rings. You can certainly feel the step on the shaft just don't have another to compare right now.