Gears and oil timer drives:
Note K/XL slots are same width but taller than WL scavenge one.
The tower marked "K XL s" is an early tower with slots enlarged, closing side only, to post 72 specs
K/KH/57 to 61?XL oil pump gears: 14 teeth
delivery gears .217" thick, 5.51mm
scavenge gears .360" thick, 9.14mm
62?/71 Sportster oil pump: 16 teeth
delivery gears .181" thick, 4.59mm
scavenge gears .375" thick, 9.52mm
They were changes to oil pumps in 56KH, 62XL, maybe more, don't know for sure what for, hence the question marks above...
...Some personal disasters... Don't ask.......