One More Brake/Spindle Question

I have a 1970 challenger I am slowly restoring. ( 360 & automatic )
I have put in a firm-feel stage 3 steering box with new coupler.
I have new 1.03 torsion bars
I have new tubular upper control arms from PST.
I am rebuilding the lower control arms and welding on the stiffing plates.
New Ball joints, tie rod ends and bushings.
Since everything is out, I might as well address the spindles while I am here.
Should I upgrade to the bigger 74 spindles?
I am wanting to upgrade to...

One More Brake/Spindle Question
Author: 1bolt@atime