You have a 4G PCM regulated alternator. This was used on 03-04 civilian vic and MGM only.
05+ civilian and 03+ P71 used a 6G alternator. You can use the 6G alternator (including the p71 200A) by splicing on the 6G connector. The outer two wires gwt swapped.
Most other parts are 03+.
The transmission is 01-03 (02- have an extra sensor, VSS, ignore the extra connector).
Most of the electronics are more year specific.
03-05 for the LCM
For rear cat delete, you just need to weld in some 2" pipe.
As this is after the rear o2 sensors, emissions tests will not be affected unless your area does visual inspections.
Member of Northwest Panthers Car Club
2008 P71, Norsea Blue SAP
-Message Center cluster retrofit
-Towncar Signature L heated power seats
-Long overhead console
-Compustar remote start/security