Edelbrock help or-

[farmero]

David here. First timer. I have a 79 duallie regular cab in which I put a GM Vortec from summit, nothing special there. I bought the base engine and added all the bolt on stuff including an edelbrock performer manifold and 1825 carb. Problem is the engine has a stumble or stutter when I get into a hard pull as in an uphill drive. It will stumble in all gerars until I get the rpm high enough then it takes off. I have tried changing the springs for the metering rods with no improvement so I am back to the stock springs. Should I start playing with the metering rods and jets? I am going by the instructions from Edelbrock website but they are hard to follow. I use this truck daily (when it works) for my farm and enjoyment. It had a frame off restoration 15 yrs ago and now it is time again. Can you get pictures to this forum or must they go somewhere else?