Panhard bar or watts linkage
 

I have a 67 mustang that is going through the steady transformation onto a real corner carver. The front is pretty much taken care of (neg. wedge kit, big sway bar, good shocks, boxed control arms, rack and pinion steering...) but the rear could use a little help. I am still running leafs in back, but have added shelby style underrider bars. I wanted to know if a panhard bar or watts linkage will help the rear stay planted in the corners (and coming out of them). If they would help how much better is the watts over the panhard bar?

with a leaf spring suspension its either watts-link or no-link at all ... the sidewards forces generated by a panhard will cause bind with the leafs, and worse, it will be different in left and right turns...