19 to 24 spline input shaft swap

Update: I received word from Pat Blais, ol' "Tflitepatty" himself, that there is a channel between the steel sealing rings in the rear clutch retainer. You can see the difference in the OD of the input shaft where the hole is above the splines and the ID of the clutch retainer where those holes are (one on each side). Because oil flows through this channel, the holes may be situated in any orientation. I will likely just line them up the best I can when I press the parts back together.