The one upgrade I have done to my black Duster was to remove the old syyle ladder bar that you had to unbolt to adjust it to a double adjustable that you can quickly adjust. It’s been on around five years and I haven’t touched it since the first time I set it up in my shop. Low 9.40’s so far and no complaints. My heads up car has a caltracks set up so I will have to study up on those if and when I get it running. My Daytona had a 4 link and went 8.40’s@160 mph and I adjusted it 3-4 times over the years with different engine combos. Notes were always kept on those adjustments