I honestly have no idea what the 'rail type' means. Maybe someone that knows Ford lingo can translate that for us.
They look like regular engine valves, no unusual features with the exception of a really nice under head swirl polish.
SI also lists the 289 valves as I 2564 and E 2563, but those are in the regular replacement section and likely do not the the additional under head work.
The beehive springs that I used are Comp 26995, the inner ID at the spring base is a nice match to the OD of the pedestal at the base of the valve guide on a slant. I was high on spring pressure though and I had to have the spring seats trimmed. If I do this again I will look for a little shorter spring. Whoever you get the valve springs from will be able to match up a retainer and keepers to the Ford valve stem diameter.
