Hi,I have a 1980 633,4 speed& the shifter has a lot of play in it.I need help? I would like any information on changing the shifter bushings.I have a 1980 528,5 speed that I'm going to swap.I'll have both transmissions out & was just wondering how hard it is to change the bushings.If anyone has any other recomendations of things to do while I have them out would be grately appreciated.Thanhs for any information. Chip