What is this Carter BBD port for?
Do you have a factory service manual for a 67 Dodge.
Mymopar.com has them free.
IMHO
I would set it up using the info for a 67 273
Not much smog control in 67 other than the CAP stuff which is mostly dist curve and timing and a valve to slow the return to base timing on deceleration.
That being said. I would cap off all ports that are not currently in use.