overspeed light
 

Hope I'm on the right page, if not, please let me know. My problem: I have a gauge panel out of a big truck in a 66 C10. The panel has an overspeed light that was in big trucks, and I would like to make it work in my pickup. Anyone know how to do that? I do not have a tach, as this is basically a nice restoration with a crate 350, 290 horse. Any help would be appreciated. If anyone would like to email me direct, my email is: daydream_guy@yahoo.com.
Thanks, everyone.