I already did Bluetooth on my first Mopar ignition back in 2012. I used Mopar electronic distributor (reluctor and pickup) and single coil with rotor spark distribution. More info on that here http://www.forabodiesonly.com/mopar/threads/dim-electronic-advance-ignition.180368 If you notice the interface looks quite similar. I went on to this new Coil Near Plug design, with greatly improved, custom timing reference signals in distributor. That is a plug-n-play solution with easily set base timing, and in car timing advance readings.
The Bluetooth adds cost, because the modules run at 3.3V. That requires more interface parts, the BT module needs to be in the car, because none are available for under hood temperatures, so cable would be required. The RS232 interface is available for under hood temperatures. There could also be BT interface issues with different phones, tablets, and BT use for hands free, and music. I decided to save $$$, go direct, and skip potential hassles. It will work with most Phones, Tablets and PCs with USB V2.0+ ports.
