I just pulled an engine/tranny out of a geo this weekend... not bad at all. That is the beauty of these cars: 10, 12 and 14 mm are you are set to go. Before you jack the car up, block the wheels and loosen the center wheel nuts on both sides...also, for reference, removing the head bolts are much much easier with the engine in the vehicle as the engine can't go anywhere when you put a bunch of torque to loosen them... i pulled the engine out, then tried to take the head bolts loose and the engine was so small it just wants to rotate so i had to use my legs to hold it and a cheater bar and get the right position to get enough torque to break them loose.....