hi,
thanks for the answer I was about to think about going with the old valves as nobody answered...
Well, I intend to fit that head on my 66 mustang. It is going to works with a 200 all stock block. That s why i was looking for stock parts.
plus local french regulation in New caledonia is not really keen with custom engine built-up.
An another hand, the machinist that pressure test the head finds out it was in good condition but do not really feel confortable with drilling anything an he never works on ford 2V head. He is concern about opening a coolant waterway. I ll rather run stock than loosing a hard to find (here) head in good condition.
as the mustand is 45years old and have stock non power little 9inch drums brakes i'm not looking for performance. Swapping the head is just about building a fuel efficient good running daily driver. Stock US log head sucks due to loosy 1 barrel carb. Log design makes poor flow, hesitating engine, low fuel efficiency, hard to tune engine ...
swapping head also makes the car unique here and in europe where it will probably ends in a couple of years ...
thanks for advices ...