So you now have a Explaination of how that basic system worked in the old days, a picture, and some real world data on a TurboForce Pontiac Trans Am from Me Crocie.
A More Modern System works much better, lets call it a pre-EFI system.
A "More Modern System" system can be done a couple of ways.
One way is to use a lower pressure high fuel flow volume pump to feed fuel into a "Surge Tank" and then any excess fuel just returns back to the fuel tank. A Mallory 140 fuel pump has worked well for this in the past and is quiet whereas the old Blue Holley fuel pump's vanes jam easily and the pump is very noisy. The old Mallory 140 fuel pumps are still out there. With no fuel pressure required it will pass a lot more fuel that 140 gallons per hour in the simple fuel circuit: Fuel Tank, high capacity Fuel Filter, Surge Tank, and the back to the Gas Tank thru a Return Line.
The fuel schematic for the boosted carb would look something like this illustration except substitute Boosted Carb for EFI in the picture.
The Surge Tank would have a higher pressure EFI style Fuel Pump (from 255 LPH to as much as 425 LPH) to feed the Boosted Carb
high pressure fuel. Before the fuel went into the carb fuel bowls it would go they a dedicated Fuel Pressure Regulator (like a Aeromotive
Regulator 13202) that could control from 6 psi to 20 psi.
https://www.aeromotiveinc.com/produc...ass-regulator/
Tom V.