Identifying my 904
One thing I forgot to mention, the case has the smaller cooler line ports for 5/16 cooler lines, not the bigger ports for 3/8 line that lockups used. Doubt that anyone would have gone to the trouble of REDUCING the cooler line size...
Non-lockup input shaft, as shown above. Lockups have a machined nose in addition to the different spline count.
One thing I forgot to mention, the case has the smaller cooler line ports for 5/16 cooler lines, not the bigger ports for 3/8 line that lockups used. Doubt that anyone would have gone to the trouble of REDUCING the cooler line size...