I like to race 10's but can be into the 9's and run only the HHP Drag Springs and the Per4mance Dev. Diff Brace.
There are lots of suspension parts that you could install.
My Husband who had his "Top Cat" Challenger heading for the 8's back in 2016 did have adjustable Springs installed that were MFG'd by Santhuff < they are installed in the Worlds Fastest Modern Hemi .....Rob Goss's X275 Challenger.
I see Mmany Higher modified Hellcats at the Track that are running the AAD products. They are top of the line. They came out later and to be competitive they have built better parts.
It's good to have a Build plan, so that you aren't doing anything twice or that isn't necessary.
Check out this link and you will see many parts that have been Track tested.
highhorseperformance.com
Linda
