Those DL shocks may be a bit long for the ecto. I am running 100mm on mine and it seems to be perfect (I'm running the same shock towers too)
Another great mod for the truck is the servo on axle, get the weight down low and off the frame
The rock pirate sliders have that tab, I have them on my son's ecto and they have been great. If you search around, someone may make that tab alone.
https://rockpiratesrc.com/products/element-ecto-sliders