Mustang 1964-66 Already determined for this applications.
Axle lengths Cut for Mustang Housing, small bearing, 31-spline 9".
Bolt pattern 5 x 4½".
As close as you can come for your OE axle replacement.

Currie Standard axle packages feature 2 custom cut and splined induction heat treated 1541 forged alloy 28 spline axle shafts.
Small bearing applications.
Packages include the pair of axle shafts, axle bearings, axle seals, 1/4" thick heavy duty retainer plates,