You can turbo anything! The best carb turbos are on cars which have a finely adjustable mixture from lean to rich, and that also have ecellent fuel distribution.
The 1 barrel triples sound great, and they only real issue is making sure the air being blown into them is applied to either side of the centre carb, in two ducts. Never try to split the turbo pressure into three, as it will always end up favouring one carb. If you tee it into either side of the carb, and run a long log above the carbs. Sort of a Cobra6-type set-up, but with two air intakes.
Second tip. If you are using the progressive linkage, make sure it is set-up richer so that on a hot day, on full boost, it can deliver the fuel for a 250 hp car. Normally aspirated, sans the turbo, there is only a need for 165 hp of jetting. Under wide open throttle with a boost ratio over 1.7 times as much as it would have as a non-turbo, you will need a good deal more fuel.
(The worst thing with carb turbos is that any standard carb has no ability to richen the mixture when a good cool charge of air needs much more fuel to avoid burning valves or lean misfires. Some systems exist to richen things when needed, but they vary depending on the type of carb system.)