Here is a good write-up. Although it really deals with DSE and Speed-Tech rear suspensions.
https://lateral-g.net/forums/showthread.php4?t=18547
When I do get my '69 Camaro, I plan to do the Speed-Tech suspension front/rear. I really want to do DSE, (don't we all??), but it would be out of price range unfortunately. I will not be auto-x the car, it will just be a weekend street warrior that I want to handle really well and I feel Speed-Tech is plenty good for that.
I feel that Speed-Tech is a great 2nd choice. After all, KARMA is getting Speed-Tech suspension.
GOOD LUCK!!!