Installing and removing the fairey overdrive is a piece of cake and well within the abilities of even the most timid of us. The following process is much easier if done on a lift but on your back is possible. Simply disconnect the linkage, unbolt the OD, and slide it out. You will see a caged bearing looking assembly that is the clutch assy. It is held on by a special nut that looks like a squat castleated nut with a bevel facing you. This requires a special tool avaiable from Rovers North ($25) to remove, as it is torqued to about a billion ft/lbs. I have been told that it can be knocked loose with a "lump" hammer and a punch, but I couldn't make it work and don't believe it. If you drop me an e-mail, I'll lend you mine for the cost of postage. Once you get this nut loose, remove the clutch and replace it with the original gear (be aware that there is a locking tab for the nut that shouldn't be reused [cheap from R/N]). Replace the cover (and gasket) and you are good to go, minus a loud whiney OD.
Clark
1977 LWB SW