340 drivers side exhaust manfold question

I have a 69 340 engine in my 67 Barracuda. I don't know what model it came out of, but the drivers side exhaust manifold is cracked at the end by the firewall (obnoxiously noisy). Question is for a replacement. Why does the manifold seem to tilt up so close to the spark plug wires when the other side just drops down? Are there other driver side factory LA exhaust manifolds that just drop down that would fit? Would that be a problem for this car? (doesn't seem to look like it). Not really interested in getting involved with headers, this car has more than enough power. Any ideas or wisdom?