The fiber thrust washer between the front pump and direct drum is selective thickness and could be 0.070" - 0.100" thick. These may be still available thru MOPAR dealer or you can get them from John Cope (CRT trans) or A&A. The fiber thrust washer between the direct drum and the forward drum (drum with input shaft) is a set thickness of 0.061". Since you mentioned during the air test of the direct drum you heard leakage, the piston needs to be removed and lip seals inspected/replaced. Need a spring compressor or carefully use a couple of C-clamps. They could have been cut during the last rebuild. The sealing rings on the back of the pump (Stator support) should be replaced. Check the fit in the direct drum as John Kunkel suggested. I always replace the bushing in the direct drum or at least inspect it because it maintains alignment of the direct drum on the stator support. If the bushing is worn out, the sealing rings will wear quickly. The fitment of the engagement lugs of the direct drum into the sun shell is critical to ensure all the clutch discs are engaged on the front planetary annulus gear splines. Should be below the edge of the square notches. The direct drum should be installed onto the forward drum (outside the trans) until it drops down to contact the fiber thrust washer. Keep rocking and turning until it drops. Replace the small fiber washer on the tip of the output shaft with a bronze washer. The fiber washers take a pounding. Several sources carry them. Then take the assembled direct drum and forward drum and install into the trans again spinning and rocking until the engagement lugs are below the front surface. Typically an 1/8" below maybe a little more. Again it should feel solid when bottomed out. Coat the stator support sealing rings with assembly grease. Be careful when installing the pump as you could damage the sealing rings. Once the pump is reinstalled, I would air check the drums and servos. . Also check input shaft end play. Should be .030 - 0.080"ish. The lower end of the spec is best. Let us know how it goes.