I think I can answer that
ive opened 4 gearboxes last week, all European 40/42 Bj and FJ and this is what i found
H41 ('79) teethcount starting from engine to transfer 16spline shaft
topshaft: 22, 28, 33, 41 (reverse), 41
bottomshaft: 37, 31, 21, 14, 14
this giver a ratio off 1st:4.925 , 2de:2.643, 3de:1.519 4th:1 reverse:4.925
H55F ('83) teethcount starting from engine to transfer 19spline shaft
topshaft: 26, 33, 38, 41 (reverse), 41, 23
bottomshaft: 43, 36, 24, 14, 14, 45
this giver a ratio off 1st:4.843 , 2de:2.619, 3de:1.516 4th:1 5th:0.845 ,reverse:4.843
H42 is the same as H55f, whitout 5gear offcourse
, now a question; can anybody give me the toothcount of a us gearbox?
ps; anybody interessed in a H41 gearbox (I've got plenty)