I show that one as a '71 BCE 340-360 manifold, being auto makers like to share as many parts for saving costs if it would have worked they probably would have used it instead of making a spedial left manifold for the A body.
The '72-'74 A 340-360 manifold you are looking for is a #3614368 this one is the match to your #3419623. Or the '68-'71 A 340 #2863553
But I hear these are quite pricey when people sell them.
I have heard of people using the Dakota manifolds on the A-bodies and there has been a thread with pictures of it on this site. I will see if I can find it.