I have an Edelbrock 1460 electric choke carb on my 1984 Bronco with the 351 H.O. It has 310K on it. How do I adjust this properly? I know you turn the two mixture screws in the front. I know where the idle screw is, but which of the two is the air and which is the fuel? Are they both fuel? How do you adjust the secondaries? Any info would be helpful. I have emissions very soon and would like to have it adjusted properly.