I reread your first post real quickly looking for your current coil over spring rating, if it is a 200 lb. rate I would try either a 130, 140 or maybe a 150 lb. spring
Did your shocks come with instructions to shoot for 2/3 compress height for the ride height ready to race? If so I have heard those same instructions from 4 different coil over companies It works well
The first coil over ladder bar drag race car I worked on and raced had 3.0 inch travel AVO on the rear, it would top them out against the foot brake staging
The first street and strip car I built with ladder bars and coil overs got a set of single adjustable Strange coil overs with 7.0 inches of travel, 15.0 inches fully extended with either 200 or 170 Lb. springs CRS
I switch the rear springs to a set of 150 Lb. springs later on and changed the shocks to a set of Strange double adjustable and that help a lot on the 60 ft. times, especially on bad tracks