Remove the two nuts securing the hose clamps for the wiring harness.
bulletFor the later cars, only one nut and clamp

Remove the screws that secure the bulkhead

bulletOne 10mm on the US passenger side, between the torque arm and the A.C. pipe
bulletFor the '91 model, One T25 Torx on the US driver's side, down behind the antilock relay box.
bulletThe relay box can be removed easily for access - pull it straight up off the brackets.
bulletFor '93 and later, one at the top, just left of the antilock relay box when viewed from the front
bulletFor '93 and later, you'll need to disconnect the vacuum hose and electrical connector from the MAP sensor at the top, US passenger side (or unbolt the sensor from the bulkhead).  When you put it back together, DO NOT FORGET to connect BOTH the hose and the electrical connector.  I forgot to connect the hose once after a long procedure and it cost an $85 trip to the dealer to get it diagnosed.  I was pretty damned embarrassed too!  

Pull the bulkhead up and out (it might be stuck; work it loose).

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