Ive seen a couple older toyotas that have a dual rear shackle stup where the shackle that conects to the leaf connects to another shackle that connects to the frame (lays flat at ride height but drops down while flexing). You can also put a pin through it to prevent it from coming down while daily driving. I havnt heard about or seen any tacos with that sort of setup. Any input or experience with this would be helpful. im considering it the setup.