Yes & no , you can get a long way with tuning , air bleeds & holes in the throttle plates to close the plates at idle do help a lot but a carb is not very precise & you always have fuel dropping out of the air flow at idle due to low air speed & long runners to the cylinders . Almost all cars with carbs do this , performance cam make it worse which is why you get the cool sound at idle but the sound is misfiring cylinders pushing raw fuel into the exhaust . Efi is far more accurate at any engine speed & throttle position , I built a 68 RR with a 440 , Race solid roller .680 lift cam , Eddy Victor heads . I broke the engine in using a 950 HP series Holley carb & then fitted a custom built EFI system to it , while it would barely idle at 1200 rpm with the carb the EFI completely changed the beast , it woudl idle dead smooth @ 800 rpm , no cam lope at all , it sounded very smooth , virtually stock except for the incredable sound of 3" exhaust but there was no way to tell there was a race cam in it at all , it started like a new car just bump the key & it was running , every function was controllable all of the power valve / accerator pump / vacuum drop / jetting circuits could be dialled in . The fuel is always metered exactly in any situation , it is delivered right behind the intake valve & atomized far better than a carb can . I would put it on everything the only downside is the $4500 cost .
Cats help too basically an afterburner to clean up any residue , I have not clue if cats would help on a carbed car there simply may be too much unburned fuel in the exhaust .... I do like the pic though
