These are the 71 A-body Manifolds (Drivers side is the same used from 68-70, Pass side is new in 71 and fits 340 A-body, 340 E-body, and C-body 360 cars)

71 340 Exhaust Manifolds A-body.jpg71_340_Exhaust_Manifolds_B.jpg71 340 Exhaust 002.jpg