[sub006]

Good choice, Jim, the BFG Radial T/A is my "go-to" street tire.

And sjw, don't forget HD Moog ball joints, tie rod ends, etc., polygraphite bushings and Koni (my choice) or Bilstein shocks. Does your 400 have a sway bar in the rear? I don't remember, but if not, research, order and install the appropriate size. These mods made my Suburban handle less like an aircraft carrier and more like a destroyer! And yes, it has 255/70 x 15 T/A's on 8" steel rims, 60,000 miles per set.

Grease your new chassis parts with Mobil 1 red synthetic every two or three years and they'll last forever.