what do you think is the best stance for a 71 duster?

It is true about the turd , but for me I don't care I want straight line performance dusters will never be vipers.

What about the Green Brick Valiant? That was a similar A-body that beat modern high-buck Euro sports cars on road courses with the same suspension setup as that which came from the factory (by that I mean they still used the front torsion bar/rear leaf setup).