Albert thank you for taking the time to write a well written post that covers a wide group of members here who have stock or near stock ride height cars.
Panhard and Watts link setups are difficult to install on most peoples 2nd gens due to packaging. Dual exhaust systems, many with the stock configuration transverse muffler just don't allow much room to set up a device.
I have sidepipes so the exhaust isn't a problem for me and I considered a Panhard or Watts to control the movement I get during certain road course corners. I had an experienced instructor follow me at Sebring and he could see approximately 1" total lateral movement of the rear axle. So I started planning out my options thinking I NEED to fix this!. In the end I decided to leave it as is. I'm not "racing" I just attend track days and HPDEs for fun so I decided the slight cornering gains that MIGHT be possible with the centering devices weren't worth the time and money spent that I could use elsewhere. I am going to install spherical front spring eyes and possibly different shackle bushings.
I also spoke with Harry Quackenboss who came up with the "Adams mod" When he worked for Herb and I will be doing that modification to reduce rear end squat out of slow speed corners on track. Pic shows the squat occurring out of a corner on track.
For those interested in the Watts Link, Fays2 makes a nice setup which might increase cornering capability of a well set up 2nd gen track car on a track WITH an experienced driver. For street use it won't do much IMHO because you can't push the car hard enough to make centering devices necessary or useful even during "spirited" driving. Additionally, really sticky DOT R or autocross tires are necessary to get enough grip to experience more than minimal lateral rear end movement before the tires loose their grip.
http://www.fays2.net/fays2_watts_link_15_.html
