70 Nova rear spring details

[BLACKLS5]

Hello, I am currently replacing the rear leaf spring hardware on my 70 Nova with multi-leaves (5) and have a couple of questions. First, How many rebound clips are there supposed to be on each spring? Mine has 2 per spring but from the rust marks it looks like there could have been 4 at one time. When going to web sites that have them for sale like Ground-Up for example, the replacements look to have 3 per spring, 2 front, 1 rear? Should they be the 2 piece style with what I would call a "saddle" on the bottom like what is currently on mine or should they be the 1 piece strap style? I ordered everything from Eaton spring and they sent a generic strap with a tab on the end but no square slot in the other end to bend the tab through. Maybe I'm just not smart enough to know how to use them. My springs also have the plastic sliders that have the rectangular back and they sent the ones with the oblong nib. Maybe my springs have been changed over the years but I don't think so as hard as everything came apart. Also is there insulators in between the springs near the center pin or is it just metal on metal? I need to call Eaton Spring back Monday and get the correct parts coming but at this point I'm not sure what is correct. Thanks for any help out there. Troy