[scooder]

Lots of Small difference manifold details. Vacuum take offs is one to watch 're the gasket sealing. Carb mounting face, some (earlier) have a third small hole open to the exhaust heat, not good for a 94, can burn the power valve.
Interestingly, when the 97 was replaced with the Chandler and groves 94, Ford still used the wrong manifold for a time. A 59A manifold has a divorced carb mounting, like the 8BA And 8RT.
Martin