I don't wanna burst anyones bubble, but, I don't recommend poly bushings for every day street driving, for a couple of reasons. for a while they were they only players in town, so we used them. I've used poly since back in the days when tires were made of rocks and to use poly bushings you had to burn the rubber out of the old bushing shells and press in the new poly bushings.
Here are my reasons against poly.
1. They still squeak... even with grease fittings. You'll be greasing them every week or so.
2. They still bind. Thats were the squeak comes from. The bushing is SUPPOSED to rotate around the inner sleeve and outer shell. Doesn't do it exactly.
3. They shrink over time. Time? about two - three years. Thats short in car terms.
4. When you install poly bushings in a control arm, the arm should rotate freely when the end nuts are tightened to factory specs. They don't. The closer to factory, the less they move. If left loose to rotate freely, the inner bushing rotates on the cross shaft resulting in metal to metal contact.
5. When installed in the rear, with stiff ( performance) shocks, it's like riding in a truck. Things like speed bumps or anything with a raised surfaced, like the bump pulling into a parking lot, the bushings don't allow the rear to move in the normal arc that it is supposed to. It feels like the ass end is trying to launch you outta the seat.
I use and highly recommend Global West's Delrin bushings. They are warrantied for life. They have uppers and lowers for the front. They cost more than poly, but they do what they are supposed to do, and that is, free up the arm movement. For the rears, I use their top of the line lower arm with Delrin bushing in one end and a bearing in the other. When using a stock spring, front or rear, a Bilstien or KYB shock works best, especially with rubber bushings. I find they work best for softer suspensions because they are valved rather stiff. This is the application they were made for, factory. With stiffer than stock springs and bushings I use Edelbrocks IAS shock. They work real good for stiffer than stock suspensions. Or you could step up to QA1's
On my car I use, GW's Delrin bushings top and bottom in the front. Spherical end links for the sway bar to control arm. Poly bushings for the sway bar to frame mounts and Baer's bump steer kit. GW's front spring from their negative roll kit with 3/4 of a coil cut. Out back, again GW's spring, no cutting, their Delrin/bearing lower control arm, Edelbrock's double ajustable upper with spherical bushing and a spherical bushing in the housing. Hotchkis support bars from the lower front to the upper front of the rear control arms, and the cross supports behind the rear seat. For shocks I use QA1's all the way around. #3 in the rear and # 6 in the front.
