Jack up the car on the passenger side. You'll see a bracket on the exhaust. It's bolted to the rear of the transmission. Unbolt it at the transmission end (it's easier). Now you should be able to unbolt the manifold and move it by hand. Keep in mind you have to unbolt the whole manifold, not just the rear half.
Don't worry about braking 123. These gaskets are pretty tough. Actually, I am surprised that you have to change yours.
[Edited by vinamg on 01-13-2001 at 08:14 PM]