Critique my planned combo

The car does have subframe connectors installed (I forgot to mention that). I am planning on using Mopar SS springs and a pinion snubber. I have already purchased adjustable drag shocks. There are no sway bars. I have rebuilt the front end with aftermarket adjustable upper control arms. Still have the slant 6 torsion bars.

Should the 8 3/4 be OK at this level or do I need to consider a Dana 60?