Need 904 assembly help!

Well, I thought I had it done, but not so fast! When I torque the pump housing bolts, the rotating assembly locks up. I must not have had the pump seated all the way when I thought I had it together with plenty of clearance. I have a .068 output thrust washer, and two .064 thrust washers, one between the clutch retainers, the other on the pump. I can get a .052 to .054 output washer, but that won't give me enough room.
A quick recap; the output shaft roller bearing appears to be too wide, and I had to get thin snap rings, and then sand off a couple of thou to get them to seat. The front drum lugs are even with the outer edge of the driving shell, not slightly below surface like I expected. If I put the clutches in without the thrust washer as a test, the lugs on the drum go in farther like I expected, which tells me I am seating the rear clutch properly when I use the thrust washer like it is supposed to be. Is it possible this whole combo is just that tight on clearances? I can bandaid this deal a couple of ways, but I want it correct rather than do that. Comments, please.