Holley 1920 Replacement Question

Hello I'm new here aND im a new owner of a 74 dodge dart custom 4 door 225 slant 6 auto matic. in the morning's the car starts but then dies and when I crank it the second time it takes a second but it will run as long as I keep rpms up. then when I put it in gear to drive the car wants to die unless I'm very very easy on the gas. any sort of acceleration and the car stumbles coughs and dies. in neutral if you Rev it slowly it will Rev out good. I put new gaskets on the carb needle and seat fuel filter fuel line accelerator pump gasket. (Light blue grommet looking thing) the little check ball floats. the power valve needle is bent and hangs up. could the power valve assembly be my problem?