I've overheard that you can swap some year Honda Civic Intake onto a 1994 Mazda B2300 Engine. Is this true? Wouldn't that mean the throttle body could work the same way?

Only if they have the same engine. Who told you that a Honda intake would work on a Mazda engine? Not a chance.

Only if they have the same engine. Who told you that a Honda intake would work on a Mazda engine? Not a chance.Not that kind of intake. I mean a CAI intake. XD Sorry my fault.