69 GT350 Intake Manifold Question

[Dennis Y]

I see a number of these intakes tapped at a boss at the rear of of the carb mounting area for a vacuum line. Mine is not so I wonder which is correct or was there a running change? Car #0361. Thanks, Dennis

[CSX4781]

Hey Dennis, I sent you an IM. Thanks,  Dave

[shelbymann1970]

I would think it is plumbed for the PB and carb vacuum. See pic. Car 2351 May 6,1969 but a 1970.