.... help with launches?
I am curious if it'* gonna help my launches much. I am going to swap the rear 1997 FE2 off the Lesabre onto my 95 SLE SC, and put the poly end-links on (already did the poly front end-links).
Also what else besides spring blocks and slicks/drag radials will help to improve from a 2.166 60'?

I have one more track day and would really like to see a 2.0 or close to it, but then again a 2.2 at Slippery (Rock) Falls is a very hard thing to achieve.

swats really dont do anything on forward and backward movement, Sways primarly influence the side to side satbiltiy of the car.....I would say springs if you want to help the launch

X2

Or better rear struts. Made a remarkable improvement in the Zilla'* launches. With or without the ELC tricked.

Spring spacers will help a lot. If you use them the right way you will basically eliminate you rear suspension. You could also try buying a gallon of VHT and spraying/rolling it on your tires. But honnestly I don't think you will need any of that stuff to hit a 2.0 on street tires. . . .Just need practice - learn you car and how quickly you can feather in the throttle.

The stiffer bar will not help or hurt your launch.
The stiffer bar will change the cornering balance of the car. The stiffer rear bar will reduce under steer or increase over steer.