i did this swap with the MORE products as well. Although they are a little pricey, i went for the MORE/Slick Rock conversion shackle hangers for the YJ springs on a CJ. It is a true bolt on and they are VERY beefy. You can see them at: http://www.mountainoffroad.com/catalog/Misc/misc.htm and they are part #SR9851 on the bottom of the page.
CJ7, T18, Dana20, Scout Dana44's F&R, Detroits F&R, 4:56 Gears, SOA (Custom YJ Springs), Weber 32/36, York OBA.