I'm trying to rebuild the lower end of my 57 RDE-19, I have a seal kit and in it is a o-ring (301877) and gasket (304764) that seal the shift rod. I cant get the old ones out, there is bushing that holds them in, is it a pressed in part and it so how do I get it out. I know it leaks so I have to do it and need help!!! Also is there a water pump kit I can get, I think I need one with a housing because the old one is pitted badly? Any help you can give me would be great, thanks.