I have a 67 with a 289. Aluminum heads, intake, dual points with petronix distributor running a edelbrock 650. car had a dead mis/hit at about 3000 RPM when accelerating. I can creep up and surpass 3000 RPM with no issues but when going through the gears it feels like the engine hard shuts off just for a beat and then goes again. I cannot find a loose connection. Can my plugs be wrong for the build? I thought that maybe it was too advanced but as I said when I slowly bring the RPMs up it is ok...what am I missing? I have had the car since 83 and have driven it every year but this studder is new (like two seasons now). thanks.