Thank you sir. I did not know that and I haven't read that here. I know a couple people make custom size valves, but I have no idea where to start as far as size goes and that's where I'm stuck. I'd like to have the valves in hand when I take them to my local machine shop. I know they have seats to install and cut, but I know they wouldn't have the valves.
If I was you I would use 49ci intake valve(Briggs pt#793556),as it is about .110 larger than stock 44 intake valve and existing valve seat can be opened up to accommodate the larger valve.