Early A exhaust manifold questions

My 65 Dart Magnum swap 4 speed, MS, I am temporarily using early 273 manifolds that go under/around steering column and barely room to get a flex pipe under Zbar.
Passenger side points down towards driver side. Fine if your going with single stock exhaust. I welded 90 degree fitting directing pipe down passenger side for future
dual exhaust.
Believe you might have a few options with auto trans.