Different opinion on the carburetor:

Find an original 350 Chevrolet cast iron intake, and an original used Rochester Q-Jet from the years 1968~1974. Rebuilt the Q-Jet.

Take the wife out to dinner (several times) with the money you saved.

The imitation AFB has only a single advantage over the Q-Jet (it is shiny). Well, it also impresses the 16-year-olds at the car show.

Initial cost, driveability, fuel economy, power, and reliability ALL are wins for the Q-Jet.

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop