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Originally Posted by 68 P.O.S.
Need your truck particulars. What year is your truck? Which engine is in it? Stock engine or beefed up? Points or HEI? Any recent work done to it that may affect the problem you have? Have you checked for vacuum leaks? Checked your fuel system for clogged filter or sending unit sock, kinked or worn lines, and fuel pump ok?
How’s your timing? If it’s not set correctly before you start working on everything else, you’ll be chasing your tail.
Edelbrock carbs are known to be a little finicky and are not exactly plug n play out of the box (what carb is?). Once setup correctly, they are a great carb. If it’s an older carb, it’s probably a good idea to clean it out real well and rebuild it. Then adjust float levels to specs, add a heat insulating gasket between intake and carb to stop carb boil, add a Edelbrock fuel pump or a fuel pressure regulator set to 5.5 psi to prevent flooding, set the transition slots to square, buy a calibration kit to dial in jetting/rods/step-up springs, and enjoy.
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All of this and buy a new carb 1405 w/a manual choke. They are
cheap enough and a new filter. That's what I did. Good luck.