Invisabledog, I feel your pain!
The valves in the pony motor come out fairly easy with the valve, guide, spring and keepers all as a unit and held in with a snap ring type retainer. The only problem being that you need to remove the intake Manifold (the whole top of the pony motor) in order to get to them. With all of my recent experience with these @*?#!(&/;%^$ pony motors, the manifold studs like to seize around the exhaust outlets. Keep the fire-wrench handy! If you can get the valves freed up you might get away with just lapping them in place. Good Luck!
'46 Willys CJ2A Farm Jeep, '49 International KB-7, '31 Allis Chalmers U, Cushman Scooter(s)
Antique garden tractors & outboard motors
Other rusty old junk comes & goes without warning.
The 2 most useful tools to have in your shop are a Crystal Ball and a Magic Wand