I went to school at the General Motors training center back in '71 and we took everything apart on brand new Buicks. Engines, transmissions, rear ends, suspensions, steering. everything! When we took the turbo 350 apart I learned how easy they were to work on. Several years later after reading lots of rebuild articles I got scared of working on them again! Your info here has made me realize there was nothing to be scared about. I'm going to pick up a 904 and rebuild it so I'm ready for when my 85,000 mile one in the Scamp gives up the ghost. Lol. thanks much for all your time and effort you put into this. Very much appreciated!