I bought these heads from Jim Blackwood here on the board. He had them rebuilt & was going to use them on the Buick 455 MGB project. I ran them for about 1,000 miles last summer & upgraded to t/a heads. They are a non stage heads & in perfect shape. $500 + $100 shipping in the lower 48 thanks.
Eric, I am not sure what was done. I am going to pm Jim to see if he can remember. I will also check his MGB 455 build thread, I think he had some info about them in the thread.
Here's a link to a post that has some info on the heads. http://v8buick.com/showthread.php?t=167214 I also pm'd Jim to see if he may have anyother info.