73' B3 340 Duster pro touring build

Can I make it work with factory gauges and switches?

Wow, I just watched the video on the ISIS website....now ya got me thinking...all those relays would be gone and all the programming options I could dream up plus several levels of anti-theft. I know your question was directed to Swisswill but... as far as working with factory gauges, I dont see why not, its got a wire going to the circut board.