this may be common knowledge, but as a first time engine builder I have some info on these heads that others may find useful.
My EQ heads were ordered bare and built up by my local machinist and head builder. I trust his work. His claim was that as received there were two problems with the heads that he had to correct:
1. The valve guide clearance was too tight, only .001". So he opened them up a little bit
2. When he checked the seats with prussian blue and a vacuum he found most seats didn't hold a vacuum well, and the blue revealed high spots, so he resurfaced them.
That's it! He also did some pocket porting...