the driver side header should be easy to get off, most bolts you can get from the top adn the rest are easily accesible fromt he bottom. As for the tranny leaks, if its the pan its an easy fix, just drop it and replace the gasket and filter. As for the rear main, if its not leaking too bad, just leave it. Not sure if you've ever heard it, but the saying goes "If your Buick's not leaking oil, there's no oil in it!" Dont get discouraged, i drive mine daily and not a week goes by that soemething doesnt go wrong. But like the others said, when its running good, theres nothing like it!