Rear shocks on a 1996 Mercury Grand Marquis

2 bolts on the top of shocks and 1 bolt on the bottom but the top 2 bolts are a pain in the neck

My Merc. has the air shocks, the air pump went bad and couldn't
maintain the pressure because of leaks. Shop wanted $800 bucks
to fix. So I converted back to coil springs, there is a kit for it $ 400 bucks

Raise car under frame then put jack under axle before removing the shock.
Can use locking pliers to hold the shaft from turning (may have to cut away dust boots). Top nuts are accessed and can be seen from the wheel wells or from the gap between the trunk and mount frame (can't see nut from this angle). Take care with fuel lines near the driver side nut.
Preventing shafts from turning on new shocks will be tough. Make sure you have a proper tool to fit top of shaft with enough room between top of shaft and trunk (gap decreases as the nut is tightened) so the tool can be removed.