how the heck did i miss this thread? subscribed.
i'm definitely interested. check out the video of the gauge in action on this
ebay listing. looks pretty nice. now if someone can just figure it out how to install it and do a diy, i'm in!
edit: i found another video of the gauge in action. you can see the back of the gauge as well. it has a speedo cable input and one harness with a plug on it. watch it for yourself
here.