A-body Motor Swap question

IS it a factory 76 A BODY manifold? The B/E bodies did not use the manifold I pictured. It pulls out away from the engine and has a cutout for the steering knuckle to clear exactly what you are talking about
Hmmmm, I will have to grab the part number off of it again. It's been a bit but I traded someone for them before I put the motor in and thought they were right. But with that part aside I am planning on putting headers on in a few months as well, so I'm wondering if they will clear the steering box now or will I need the Borgeson one?