Chaz,
Nope, I run and recomend a adjustable 4-link, coilovers, and (panhard bar or watts linkage, but NEVER a diagonal link). What BVLR and I are refering to is the instant center setting of the four bar.
I have always run mine in a neutral position with 400# coils, and he runs his for a much softer hit with "sissy" springs.
So now I Am going to try it his way, so if you see me bouncing like a buckboard down the salt, blame him.............................. (p.s.) I hope it works!!!
On the weight deal, weight behind the axle is fine as long as the nose of the car is going straight forward, but if you get it sideways the weight becomes a pendulum and it wants to keep going.......... not so bad with a tru-trac or posi, but nasty if you run a locked rear end. I can describe from experience what the panoramic view of the flats is. You can tell how many times you have spun by remembering how many times Floating Mountain goes bye..................................