I bought mine in 1973 from a guy who did not know anything about cars, so i doubt that he would have changed it...and mine has breather with a single nipple...

the hose coming of the center carb vent just shot straigh out and stopped next to the edge of the air cleaner..

the car was sold in Atlanta, ...believe it was Burns chryser plymouths...

Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)