To identify your lift SITUATION, all I can say it dangerous at best, but you have heard that one already.
YIPES is my second thought... but SuperLift uses the OEM Blocks and an additional block for the rear lift, and then you have the front coils WITH Spreaders... I think !
All I can say is it is a mess and looks to be on the dangerous side of a lift kit, if you can call it a kit !
If it was me and I got a truck with this mess underneath I would rip it all out and replace it with a decent kit.
If you aren't doing heavy off-loading, there a couple of kit out there that would be safer than what you have.
My only changes to the kit, I did two, one was to eliminate the blocks for the rear lift. I used SkyJacker 6" Rear Spring, no blocks, new U-Bolts. Also added, but not necessary the Coil-Over Shock for the front.
The rear blocks, every time you take off, must twist the rear spring into "S's", if a Home-Made... it is almost undeniable why they were used but why are the newer kits using double block ? The problem is this, when the springs are twisted on take off and in spinning-grabbing situations, it can work harden the spring. How long has the rear springs been in this situation, I would find out and double check the springs for any cracking around the spring/axle and spring frame mounting positions.
Good Luck !
Ltr