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70 Road Runner 440+6, orange box Mopar electronic ignition, older Jacobs coil. It was running rich at all speeds. I'm getting the carbs rebuilt which should help, but I also have a Crane HI6-S ignition box and PS91 coil new in the box that has been sitting on the shelf for five years or so collecting dust. The engine is pretty much stock with stock cam and compression, headers, 3" exhaust. Will the Crane help in mileage, power, etc. enough to make it worth the effort to install, or should I sell it?
