the rpm's on my 86 Camaro 305 4bbl bog down at first when taking off and I've run out of ideas of what it could be, has 130k miles on it and I already replaced the plugs, plug wires, new msd distributer, new intake, new holley 600 carb, new fuel filter, and got rid of the emissions crap so it couldn't be a vacuum leak so I have no clue what else to do, anyone have advice please?