hi i switched my car over to carb and ditched the entire ecu and everything relatted to it. the tach still works, but the speedo does not. i'm thinking of getting some after market gauges put in. i'd be hooking the speedo up to the stock 700r4. so how do i know what gauges to get that will hook up to my tranny. not looking for anything fancy, just some autometer gauges or something.