This is the electronic parts of the Gear Vendors Overdrive. It was built in August 2012 (see date on controller) and worked fine when taken out of car last month. Comes with controller, speedometer adapter, dimmer switch, wiring and some other miscellaneous electrical parts (see photo for details). You will need to adapt to your car as everyone is a little different this was in a Chevelle. You may need some parts still (other than the unit itself or speedometer cable) but a lot of the electronic stuff is here. If you already have a unit but want some spare parts that is also an option or are trying to piece one together. $250 shipped OBO.

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Electrical wiring Gas Technology Electrical supply Cable