Transmission assembling question

End play spec. is quite the range, For your year of trans. between .036 to .084 thou.
FWI This possible 2 piece thrust washer your literature mentions does exist, but not for what your working on. It was used in 1979 and on 904, 998 and 999 trans. models. It had a cupped bearing and a thrust washer. Different thicknesses of this washer were available, .053 .069 and .084 thou.