Leaf Springs

I have a couple of questions and comments.
What did you launch the car RPM wise?? What tires you run out back at the track??

Too me,when I watched both videos, is that your not bringing the motor up on the converter. When you bring the motor up on the converter,the back end will lift and then when you whack it,the springs SHOULD arch and give you more hook and lower your 60'.
If your running a true street tire at the track,you NEED a drag radial or slicks and either one of them will lower your 60' times.

Just my .02