Holley street avenger running too rich.
Hey guys! I installed a Holley street avenger 770 on my 460. The car runs but I have black smoke coming out of the exhaust and I keep fouling my spark plugs. The carburetor came with .70 main jets that I replaced with .64. It also came with a .31 squirter which I replaced by .25. turning the idle mixture screws doesn't affect anything even up to 5 turns counterclockwise. I can't find any squirters or jets smaller than this so what do I do next. The timing is set at 12° with the timing advance disconnected and plugged. the rpm is around 700. the engine has an Edelbrock 2167 camshaft with Edelbrock 5767 springs and a set of Speed Pro H535CP flat top piston. other than that it's basically stock. Thanks for reading!
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