do i raise or lower ride height to get more

Poly bushings, like most high performance parts, are only a benefit if you push the car hard enough for the parts to do their job. In a normal driven street car stock rubber bushings are fine. When you move up and start pushing the car such as auto-x and other arenas that generate high cornering loads you will need and notice the benefit of better bushings. Poly bushings deflect less than rubber and prevent alignment changes caused by rubber bushings compressing. When I was drag racing my car I had my alignment done with the front raised 4”. At rest the car was out of alignment but when running down the 1/4 under power the alignment would be in.

If you run meats and streamers with SS springs in back and low in front your car will never corner very well (or as well as it could or should, for you guys that think your car corners great with this combo). My car rides on E70-14 red line tires and 14x5.5” rims. It sits level, with no clearance problems. IMHO the car (340 Formula S) works very well in its stock form. This coming from a BMW E30 M3 driver.