I have been playing with the idea of cutting a hole in my hood , but the thought of cutting a hole makes me nerves also. I like the looks of the hood tach. on firebirds , that wow factor I guess. I am wondering is it worth it to do it? will it hurt the value of my car because it is original , matching no's . will it cause problems on down the road. are the repro reliable? has anybody had any problems? is moisture or heat a factor on them? plus I converted my distributer from points to breakerless ignition similar to pertronix will that be a effect also?