help! correct redline tach for 69 396/325 4speed

[Mr70]

That looks like a Manual Trans Chevelle engine picture to me & that should & does have A.I.R.(No TH Vacuum line next to the Distributor)
I have similar 69 Chevelle factory Hydraulic engine pix & they too Have A.I.R. w/Man. trans.,yet the same engined Chevelle w/Auto. Trans. does NOT have A.I.R.
For 1969,I thought the BB Camaros were the same Scenario as the BB Chevelles.

For 1970,ALL the Solid Lifter Engines received A.I.R.
But starting this year,the BB Hydraulic engines did NOT receive A.I.R. anymore,regardless of Trans. type.
Starting in 1970,all Engines & trans type received the new TCS-Transmission Control Spark System.