Manual Valve Lash Adjusters
Zoran,
From the resources I have on-hand, it appears Ford started using hydraulic lifters in 1963. They deleted the adjusters that year as well. I learned this from my factory shop manual which covers through 1963. I also have a Motor's Shop Manual for 1965 through 1971. In it, it indicates adjusters were part of the 1965 and early 1966 configuration, even with hydraulic lifters, but disappeared again in late 1966. I don't have anything that hints at the configuration for 1964.
The valve "lash" dimensions I gave you previously should be valid (2-5mm with the lifters collapsed).
I hope this helps. If anyone has better information, I'm sure they'll chime in!
Good luck!