Critique my planned combo

I don't see that the sub frames are tied.....if they aren't , do that.
I'd consider bracing the housing and adding a billet cap on the driver's side too. Not a bunch more to do for an 8 3/4 , but it will help it last.
Get the suspension to work.....this will pay off in both e.t. and consistency.
Make sure the front is free to move and use what has worked for others as a guide.
I picked up a tenth in our last car by copying a few stock eliminator tricks.....it was a Ford , but the principals are the same.
Six cylinder coil springs , ditch the sway bar , good shocks and a travel limiter up front.
Good shocks , clamp the leaf segments in front of the axle and adjust the snubber on the slapper bars to 3/4 below the spring eye......CalTracs are the rage now , and they obviously work.