Following are photos of the side exhaust installation with captions as needed. All work was done by Bruce's Street Rods in Bandon, Oregon (www.brucesstreetrods.com).

Bruce tests the location of the side exhaust after assembling the parts on the work bench.

Because this is a show vehicle, the cats are set aside to be reinstalled at some future time.

You can see the oxygen sensor ahead of the exhaust flange. Two of the four sensors in the Crown Vic's exhaust system are retained. The other two can be re-installed if necessary.

The connection between the header and the side exhaust is tucked tight (even with the bottom of the oil pan) and straight. The clamp holds the parts in place prior to welding.

Part of the mud guard was cut away to bring the chrome pipe up close to the body, again to keep the system from being lower than the oil pan.

Installed, the system sits close to the body and provides good ground and tire clearance. The pipes are 80 inches long.

While granny will have to watch her nylons when exiting the rear door, the exhaust looks and sounds great. After this photo was taken, the area behind the side pipes was coated in black Por 15 to protect against corrosion and make the pipes visually "pop".
Some thoughts on the installation: Not shown in these photos was the amount of thinking and care taken to make the system work properly. For that, Bruce is a master, more engineer than simply a street-rod parts installer.
For example, Bruce added extra bracketing and custom bracing to the bottom of the side exhaust extending to the frame. This keeps the system rigid enough to maintain the proper clearances but flexible enough to reduce any strain on components.
These are great exhaust sounds and looks reminiscent of the popular lake pipes of the 50s when the Glass Top Crown Vic was in its heyday.