Will go slightly against the grain here, to suggest that building carbs for turbos is no more difficult than for anything else if a suck-through design. Blow-through designs are somewhat more challanging, depending on the boost. We have build many over the last 40 years.
All are more reliable and less expensive than EFI. Remember the cell phone wasn't necessary until EFI, and then the cell phone had to be invented to call the tow truck

or possibly the Brinks truck :bigger grin:
Jon.