Help need suggestions & advice

Oh iv'e called edelbrock and they just say all they can do is send me another one lol, they dont even sell repacement throttle shafts. I'm still not 100 percent sure what i'm going to do, but i am leaning twords getting a quickfuel 680cfm vaccum secondary ss series carburetor that comes with teflon throttle shaft bushings and teflon throttle shaft bearings.
I sprayed some white lithium grease down at the transmission where the throttle valve cable goes and it seemed to help make it easier to pull forward. I am begining to think the edelbrock carbs just cant handle having a throttle valve cable hooked up to them.