Finally, according to this article on MS3 and about 22 degrees of advance at WOT is about the max for this motor. For those who've run 50 degrees, me thinks there might be some other issues in your setup. I've never seen a motor run well on 50 degrees of advance.
http://www.diyautotune.com/tech_articles/how_to_megasquirt_your_new_hemi.htm
Regards,
Joe Dokes