Unknown Ferrea Valves
Just to follow up on this...
No. it doesn't really matter what they are, and there's always some part(s) that no one can identify. But, it woulda been nice to know.
Zeke, from Ferrea, replied to my email and said they have nothing with those numbers in their system, which dates back to 1995.
He provided the numbers that cookietruck provided, and the sizes match. I guess they're stainless steel, but as I said to Zeke, they've been in a running engine, and I was just curious as to what they are.