SS/B Barracuda project

Stefan from what I can tell what I posted is only partially correct.
To get a better grasp on the Dana axles used in Chryslers you need to look up the Spicer BOM list.
You can compare the BOM #s to get the axle part #s and lengths, splines and dates. Chrysler went back and forth between the track & power lok between 66-78.
The 2 direct connection axles I posted above were offered between 74-78.
The earlier 5 or 6 Dana axles offered were production pieces.
BOM # 602957 had the 23 spline in 68-69 in the b body with a power lok.
One B body BOM# 602875 may be the 68 super stock axle but I have found little information on that Chrysler/Spicer #.