[66gtk]

Dan, I pulled some plug wires to take a look. I found a clear 6090B part number and a near by number: B9AC on the left side heads. Not sure what all that means, but I was told the heads were ported as well.

UPDATE

I did some digging and found a set of 1959/60 Edsel 352 heads with similar markings on Ebay - makes me conclude that they must be B9AE instead of B9AC as I read them. B9=1959, A=Full Size, E=Engine. These would have been originally installed in a 1959 or 1960 Full size Ford/Mercury (Edsel?), and I read that they were essentially the same as the 390 heads that replaced it in 1961. Now those are some heads you don't see every day on a 427 Cobra!