SS/B Barracuda project

The way I understand Dana's were done is this...
66-69= 23 spline. I believe this was because use of the trac-loc
70-71= 30 spline this is with the power loc limited slip
The direct connection race Dana's had the MW 35 spline axles.
I am not sure but There may have been some 35 spline axles in some of the later b bodies with power-loc's?
I have one power loc that looks stock and has
35 spline side gears and the thrust button for adjustable bearings in the cross shafts. It is possible someone swapped out the side gears but looked untouched when I got it???