Thanks for the replies so far. I apologize if I posted this in the wrong forum, the label said "anything larger then 8x10" which I thought would include 8x10. In either case I do appreciate the tips on focal length of the lens and shutter size. I'll measure the opening once I get my hands on it. Also, I did read all of the LF forum posts about the Szabad cameras, like I said the google search only came up with a few links and that was one of them. And not much in there about lens board size.
Again, thanks for the help