Yup. Stock 4wd chevy shackle connected to a 6 inch "toyota" shackle. Run IFS bumpstops so it doesn't bang off the frame.
I'm not knocking the fact that you are using a double shackle as it seems to be working great for you, but you can get a square tube to have "extension" with a double shackle. The springs really only function in compression. This is why I'm never impressed with the droop in the suspension of a double shackle rig, it's expected.