Literally going through your exact experience now. Crawled under my car Saturday to put my QA1s on and was like "wait, what's going on here". Had to rig it with a bunch of washers but not much choice. Those spacers they provide don't do much.

Follow my G3 Hemi Barracuda build on Youtube
https://www.youtube.com/watch?v=XSDAWczXoZw&list=PLTus_wQu8POADHEeJNJp2nr4NMHEyB9EK

2015 Tri-State Stock Super Stock Champion
2017 Monster Mopar Pro Winner
2018 Monster Mopar No Box Winner