While the old Mopar Race Manuals had a lot of good info and still do, some of it has become obsolete. I found that the harder a car "hits" the suspension, the stiffer the shocks need to be. HP, converters, gears & tire technology have changed a lot. My 360 Dart Sport with SS springs running mid-low 11's didn't hook as well and even wheel-hopped under certain conditions with Competition Engineering adjustable shocks as well as with the Mopar recommended 4-speed drag shocks. The shocks couldn't control the separation and springs wrapping and un-wrapping. The stiffer Ranchos made a big difference.