rocker arm geometry
http://www.forabodiesonly.com/mopar/showthread.php?t=224353
Above is a link to my rocker geometry thread I started a month back about the same thing. While the parts we used are different the problem was the same. You could go through it and see what advise was givin to me and what I came up with for the resolve (I settled with lash caps). It may not solve your problem but maybe help with some ideas to do so. From what you discribe your only option is to drop the coin for a different brand of rocker to only prey for them to line up better. Seems a little ridiculous I know.