When I built my 74 Scamp I had a leak from the input shaft seal. After disconnecting the steering shaft and pulling the steering column back a little I was able to drill a very tiny hole in the seal housing, then start a small screw in the hole and then put a pair of vice grips on the end of the screw and tap on the vice grips to pop the seal out, it worked out very well. Installing a new seal was easy with a deep socket the correct size and make sure you lube up the new seal before you re-connect the steering shaft it never leaked again.
Bob
