Another lowering block question

I run a pair of 3200 lbs passenger SS springs on my 68 A-Body and my 70 E-Body. Both cars weigh in at 3700 lbs with no driver. I've fitted slapper bars to both cars to control the spring wrap that happens on launches. Both cars hook up incredibly hard on the street using Nitto Drag Radials.

This combination is the best I've ever experienced, and I have tried at least a dozen different combinations over the last 40 years. The springs are relatively cheap and can be ordered individually from Summit.

slapper bar 5.jpeg