That belt I relayed to you earlier was for a NON A.I.R. application.
The correct BB 1969-70 A.I.R. belt from
Quanta is actually
B-603 and measures 3/8" X 47-1/2" for $27.00.
Chevrolet sees it as GM #3883248
YE,originally cloth wrapped and was never cogged.
That's a modern day ACDelco knock off your showing..
