Suspension Tuning Without Rear Sway Bar. Need Advice.

[Later-A-body]

As some people might have read, I have been finishing up the re-restoration of my 1973 Pontiac Grand Am. During the build I followed through on incorporating a rear coil-over suspension. Apparently the rear sway bar was not mounted when the coil-over suspension was designed, which has lead to me finding out the rear bar will not fit anymore. I was somewhat irritated with this at first, but then remembered that many people such as Doug Norrrdin at Global West advocate for no rear sway bar. I did some reading and internet searches on the subject as well. I would like to get some opinions from some of our well versed suspension gurus as to how to go about tuning this set up. The car weighs approximately 4000 lbs. with me in it. Drivetrain consists of LS7 power connected to a Tremec Magnum T-56. Rear suspension consists of GW tubular LCA, and GW adjustable UCA. The front consists of GW LCA, and Speedtech UCA with matching Speedtech Extreme 2.0 spindles. Tires are 200 treadwear Nitto NT05's, 275/35/19 front, and 305/35/19 rear. Shocks are QA1 double adjustable front and rear. Spring rates (for now) are 600 lbs. front, 200 lbs. rear. Front sway bar is a factory '78 Trans Am WS6 solid 1.25". I will attend some autocross events and track days with this car, but it is not a race car. Thanks.