I had my 1970 Superior in the shop for new control arm bushings. God only knows what the hell they did, but it's making an awful knock now. They swear it was always doing it... riiiiiight. To my ear, it sounds like it spun a bearing - or maybe a cracked flywheel. Dropped it off at a different shop this afternoon to diagnose which one. I hate not having the facilities to do this kind of thing myself. Whether it be this car, or any other I have ever owned, I can honestly say I have YET to find a mechanic I can fully trust that will not cut corners and will give my car the same care and attention I would.