Complex sentence: For the 1954 interceptor new equipment such as missiles and radar systems would be radically different between designs, there was little expectation that one missile could be swapped for another, for instance, both due to different electronic requirements as well as very different mechanical layout.
Split into simpler sentences: For the 1954 interceptor, new equipment such as missiles and radar systems would be radically different between designs. There was little expectation that one missile could be swapped for another, for instance, due both to different electronic requirements as well as different mechanical layout.