Upgrading my 340

Killer;

Then if you are correct, then explain forced induction relative to vacuum.

You can't and therefore your wrong.

Carbs do not work on vacuum alone.

A forced induction is pressuring the engine. Above and below the carb. It is the air flow going past the carb gas ports in this manor. Not vacuum.



They work off pressure differential. The greater the pressure drop across the Venturi more fuel flows.

The greater the total pressure drop relative to atmosphere means greater total air flow.