The instructions are a little confusing. I'm hoping alignment guy can help me set the proper length. I do not have a 1/2 Allen so I'll go get one today. Clean the hole in the control arm before slipping the bolt through.
IMHO with nylon lower control arm bushings, the proper length is where you get the least amount of bind.
The geometry is not perfect with these hemi joint strut rods.
I adjusted mine to get the least resistance with the lower arm hanging down like at launch.