340/360 Drivers Exhaust Manifold ID?
None of those numbers on that tti list are for anything 70 down in an a body. The first two aren't even A body numbers, they are B/E manifolds.
Anything with a 38 beginning number is going to likely be later than 75 for fit. B drivers side don't usually play well on A body cars.
Pictured in the TTI is the B body style.
This is an 67-76 A body style 340-360 driver side. The steering column is an issue and addressed.