If we ever got them perfect, we'd probably be so bored we'd have to get a different project anyway. I like riding the edge of traction in corners so ironing out the suspension was a priority for me. Donuts are fun, but not when you run into stuff.
I thought about using my 8.8, but the added unsprung weight was prohibitive. I plan on staying with the rotary so the GSL-SE rear should handle most power levels I'm likely to achieve. I can see where it's an absolute necessity with the power and torque yours will be putting down though. From what I've read the SE rears are fine up to about 350 - 400hp.
The uneven Watts link was less than ideal, but the super short angled upper arms are the big culprit in suspension bind and driveline angle change. Which is why a lot of guys don't run a rear swaybar, the bind already provides enough swaybar effect. After cycling the stock suspension a few times without springs I saw that it had a LOT of bind.
