LARGE DIESEL VALVES? (not Hudson related)

dwardo99

I have some very large engine valves I am trying to identify. The intake and exhausts are about 2 5/8" and 2 1/4" respectively and they are 11 1/2 inches in length. They were made by the famous Thompson Products so they must be late 1950s or earlier. They are so long I think they might be for a huge flathead but I don't know. I'm hoping some Hudson enthusiast might have a valve application catalogue or some experience with large engines and could tell me what they fit. It's driving me nuts!