I have a 1985 w150 with a 318 that has a 650 double pumper, edelbrock air gap and headers with a full three inch exhaust, other than that it's stock. Im getting a very bad bog starting off and if I floor it the truck will stall. I have to feather the gas to get it moving and the it runs ok. I checked for accelerator pump shot and I get a shot as soon as I hit the throttle. The timing is at 14 inital and 34 total. I just swapped to the four barrel and am trying to get it sorted out. Any help appreciated.