Lots over overthinking going on.
1.......It matters not where the distributor is, if the rotor is pointing at the no6 cylinder plug wire when no1 should be firing that IS THE definition of "180 out"
2......The only reason on these cars "why" there's a "specific way" of installing the distributor is so
A.....The assembly line folks can wrench, repeat
B.....The plug wires "lay nice"
C....The mechanics that come after "see what they expect to see."