Big Block seems to slow

13.89 @ 100mph now. New plug wires, plugs and distributor cap, with a little more tuning woke it up tremendously. I’m happy with it now but it still a weird car because it doesn’t run on the ignition box since previous owner had points setup in it. But going to keep it like it is and build a nice 440 or 360 small block for it not sure on the direction yet.