Alldata instructions have you working from under the vehicle
Unplug all 4 oxygen sensors.
Remove the complete "Y" pipe (includes both catalytic converters) to get to it.
Remove the transaxle heat shield.
There is a tool to install on the flex pipe assembly, Part # T94T-6000-AH , it is called "exhaust connector holder" and installs onto the flex pipe unit that is behind the "Y" pipe assembly.
This is to protect the flex joints from damage from too much flexing.
You put that on before removing the "Y" pipe.
So, as stated above, it is a LOT of work.
Anytime I have worked with any exhaust system, if something does not break, or otherwise go wrong, I feel blessed.
A good soaking of the bolts, such as the nuts holding the "Y" pipe to the exhaust manifold studs, and the bolts holding the back of the "Y" pipe to the front of the flex pipe is a good thing to do.
Also, be VERY careful about the oxygen sensors, on my '96, the rear most sensor connects into the back part of the rear most catalytic converter. VERY easy to have the sensor mounting ring break right out of the converter body. I had that happen, and was lucky that I was changing the "Y" pipe unit anyhow.