The BOSS system requires a different set of wiring harnesses, the BOSS controller, additional sensors and one additional relay.
The GOOD: The BOSS system is basically a controller that receives signals from temperature and pressure sensors in the engine, hydraulic and hydrostatic systems. The controller compares the input values to a range of acceptable levels. If any input signals are outside the acceptable range, the controller switches the fuel solenoid solenoid to a 30 second timer. This allows the engine be be started and run for only 30 seconds at a time so you can move or load the machine. This provides additional protection beyond the basic instruments. (By the way, you turn the fuel solenoid open by hand and put a wedge behind the lever and the engine will continue to run until you remove the wedge.
The BAD: The controller and display are quite expensive if they break. The early BOSS systems 1993 and earlier were not the best that Bobcat could muster. They upgraded the system and it has evolved to system that is now in all Bobcats.
I have BOSS on my 763 with 2100 hrs and have not had any problems with it. I had a couple of people warn me about buying a machine with BOSS. I asked the dealer about removing it and they told me about having to buy all new wiring harnesses (read not cheap
BOSS was designed to help prevent problems from getting really expensive by forcing you to deal with them before serious damage occurs. You will have to balance that benefit with the potential costs of maintaining the system. I like the idea of the controller keeping a closer eye on the systems to keep me from accidently destroying the expensive stuff. But have also decided that if the controller or display goes out, I'll probably end up removing the BOSS since it will be less expensive than replacing them.
Depending upon the condition of the loader and number of hours I don't think I would take the time to change out the all the wiring in the C series to install the BOSS system. There are alot of people who believe BOSS is a bad thing and may decrease the value of the loader in their eyes.
You will have to decide if the time and effort is worth it to you.