i don't think it will work. i didn't use the stock leaf spring hangers on mine b/c my bar ends are too wide so i don't know for sure, but my mounts are further out than a stock hanger so i would probably say no.
i am using the stock leaf spring hanger and i have 2600s...with 20's not really a problem at all..i just made my bars with a little angle in them so that they would never touch but you have to with 20s either way