74 Slant 6 Bogs & Stalls Under Load / 30 mph

Yup. When a brand new carburetor could be had for $36.57, "throw it away and get a new one" was sound advice, but we don't live in that world any more. There's no reason why a throttle body rebush can't result in a carburetor that works as well as a new one—if it's done skillfully and carefully.
Even better than "a lot" of new ones.