Measure twice before you cut. You want the input taper beyond the bearing but not bottoming on the crank, maybe .125" clearance.
If it helps, this is what I found on a 440 crank in a block. The depths were measured with my Starett as best I could from the
END of the crank.
Use at your own risk.
Concerning the diagram below, in a Brewers Performance diagram I've seen, I believe
the 2.225 " depth is all the way to the drill point. It may well be the better dimension to use as they have had more experience with this. Drilling too deep gets you into a journal oil passage.
The trans input/bell should be typical of the un-cut input shaft IMO. So the input would be 2.120 into the crank.
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