Maximum advance curve on my 360

Yes the same dizzy was used. You have a good point there. What I will do is recurve the dizzy. The dizzy is a Mopar performance dizzy running the MSD box. So I will lock out the vacum advance aswell ( I did this before but I will do it again). I read an article saying if the heads are designed for fast burning the advance has to be reduced. It come from page 4 of this article I read here. Very interesting article.

http://www.streetrodstuff.com/Articles/Engine/Detonation/Page_4.php

Can these heads be in this category? I have lived with it for years. I don't mind it but I am not sure weather I am getting muximum output out of this engine.I have figures but nothing to compare with. I should of installed alloy heads. But ran out of money.
Conclusion?
I blame the heads. They are emission heads.
Thanks for all you kind advise I will let you know how Ill go with the dizzy recurve.
Regards
Billy D>>>