Need some suggestions here. Stock 330hp 454 with 300 hours. Edelbrock Performer RPM intake, full MSD ignition, I JUST rebuilt the 850 dp Holley. Jets are 80 and 82. Stock size accelerator pumps and power valves (all new). In a jetboat. Here is the problem. When I ease on the throttle slowly, it has a spot just past idle where it wants to die. If I continue to slowly accelerate it will get past that dead spot and run good. If I accelerate quicker, the engine is extremely responsive and otherwise runs great. Just that problem spot between 1000-1500 when accelaerating slowly. Appreciate any suggestions, Thanks! 1QJ