I have used pinnned and unpin BB oil pump drives, never a problem with either as long as something solid doesn't get sucked up into the oil pump. I have reused stock oil pump shafts for the bronze aluminum roller cam gears years ago when that was the only option with no pins or problems either later
If Crane says lifetime warrenty I would probally buy one of those if I needed one
I ran a Mopar brand bronze oil pump drive on my old pump gas Duster for around 3000 street miles and a bunch of 1/8 and some 1/4 mile passes shifting at or above 7000 RPM on it with no measureable wear or problems