HEI distributers do not look like stock in any way because they were never stock for FGF's. they are noticeably bigger and some people run into clearance issues with the firewall (and some do not) if you want to stay relatively stock-looking and and improve reliability and performance just upgrade your internals with something like a pertronix and new cap, rotor and coil. They worked fine with my hood tach. http://www3.telus.net/68bird/engine_ignition.htm Kelly
