Whats my best carb with little work and good performance?

Actually the rochester mech FI was pretty good, I have worked on a few, drawback was the pump wouldn't pressurize the gas at a low RPM, so the 283 would flood, die, and foul plugs under say, 1700RPM. Just like Hillborn, LOL.
Q-Jet? Probably the longest lived carb ever made. But you will suck the single bowl dry in a jiff. The little 2bbl Qjet with no secondaries will run almost upside down too.....

I use the AFB for reliability and MPG for the long haul, not for racing. (LOL) And nobody is hammering the OP, just giving opinions, which turned into racing circuits.

Now get off the computer and get back to the die grinder, and I'll take my boat out and test my new fuel flow sensor that hooks up to my chart plotter, and tells me MPG, fuel rate, how much gas I got, and how much I will burn from A-B.

My Boats got an AFB by the way.... Holley power inboard boats blow up. :axe: