i think this is it

Your better off with the Magnums and a thicker gasket than the one recomended to you in another post by a fella who has been there, done that and drives it daily.

He told you that his engine runs on 89 without problem. Why are you yet again insisting on beating your own drum into a nightmare build? You came here for advice. You red it and throw it away.
Then you come up with this?!?!?!
Both heads mentioned above are closed chambered heads. Why choke the engine with small ports?

You know what, this rant ends with;

Go on and do what you will, we told you so. Don't cry to us when you get a crappy performer. I'll skip answering you and your smarts.