MAINTENANCE / MODS
Knock Sensors:
I had a passenger side knock sensor that was leaking some coolant, so I decided to just replace both of them.

Standard Motor Products
#KS2
Maintenance and Modifications
Spark Plug Wire Boot Shields:
From the factory the two most rear spark plug wire boots on both sides (Cylinder #5,7,6,8) have some metal shields that protect the boots from the exhaust manifold heat. I decided to buy four more and put them on all eight plug wire boots. I purchased them from the Impala SS Super Store:

http://www.impalasuperstore.com
PPG SunGate Solar Reflective Windshield:
My Caprice was ordered with the SunGate Winshield option. It still had the original windshield, but was very pitted. I had Novus Auto Glass replace it with a new PPG SunGate Windshield. The SunGate technology has metal particles embedded in the glass to give it a solar reflective property.

From PPG:
The Sungate windshield is a laminated, high-performance solar control product designed to reflect infrared rays while meeting all federal requirements for light transmittance. With the ability to reflect over 50 percent of the sun’s total energy, the Sungate windshield will never be mistaken for a conventional tinted windshield. In fact, it outperforms such products by 400 percent.

You can tell if you have the original GM factory SunGate windshield because the PPG/SunGate logo will be on the lower passenger side corner. The replacement glass has it on the lower drivers side corner.

PPG, #DW1275
Delco Monsoon CD Radio:
I upgraded the stock radio to a Delco Monsoon version. These radios are the upgraded sound system that was available in the later model Chevy Camaro. The Monsoon version has a higher output than the stock Caprice/Impala SS radio. My stock Caprice radio had a very ratchety feeling volume control and didn't have the auto-amp preset for Country Music (C/W). The newer Delco models have a much smoother volume control and have the auto-amp preset for (C/W). I purchased a used radio from a factory authorized service center.