BBC , pg, 1.80, 4.30 rear. Currently running 29.5 x 10.5 W. Car weighs 3,480lbs. Has afco double adjustable coil overs front and rear. And a 4 link suspension. My question is if we go to PBR's what kind of numbers should I look for when plotting the suspension out. The tracks are generally marginal . Currently running 5:80's. Thanks for the input.