Narrowing b-body axles

I just got a set of 1966-67 b-body axles to narrow for my 1967 Barracuda 8.75. Now I have heard a lot on this forum about proper length to go for (28 " is what I think is the final word for bbp rear brakes) what I am concerned about is taper. These axles do taper near the end but after measuring it looks like I will be fine getting them cut and re-splined. As a final check I thought I would ask if anyone has used these exact axles to shorten.
:prayer: