‘87 351w, still running points and condenser ignition. Boat start with the touch of a key and will idle and run great until you get over 1/4 throttle. Starts to have a noticeable stumble, then when you mail the throttle it chokes and misfire bad. Can barely get up on plane. If it does get up on plane, cannot go wide open. I have cleaned the carb and made adjustments in all directions with no change, new points and condenser with no change, new plugs (old ones looked great) with no change. Kind of at a loss here. Gets worse as the boat gets warmed up. One thing I did notice is that the plug wires the previous owner installed fit VERY loose into the new cap I installed. Could that cause a misfire under load? I pulled the coil and am going to ohm that today. What are my specs I am looking for on that? Any input is appreciated.