Me and Slip just had to do this on an auto recently. That was a PITA, but we figured out a decent way to do it. Get a buddy, one on top, one below. With a bungie cord, pull all the wires and lines at the back of the motor on top out of the way, do everything you can to open it up back there. Including removing the rear cross member and use a jack to lift the tailshaft of the tranny as high as it will go (you will start jacking the car with it if you go too high, thats bad). Get yourself a set of rachet wrenchs! The ones with swivel heads are the handest, no mechanic should be without these. The guy on the bottom should hold a wrench or socket on the back of the bolts, the guy on top should go at them with wrenchs and rachet wrenchs. I had to use to two wrenchs locked together to get enough leverage to crack the nuts, after that the rachet wrench will do the trick.