Axle Housing Vent Screw / Brass Tee

your right. the a body hoses i ordered for the 2 different a body 8.75 rears i have here(70-72 and 71 and earlier) were incorporated into the hose but a b body 8.75 rear i did awhile back, had a separate tee.

I've sold a many of A-body 8 3/4 housings. I have never seen the hose/tee as one piece.