You are right about the passenger side. The #6 plug is too close to the shock tower for anything other than a 90 or a short 45. On the driver side the #7 can't use a 180 because the steering shaft is too close.
Ideal situation for me would be this:
#1, #2, #3, #4, #6 = 90 degree boots.
#5, #7, #8 = 45 degree boots.
Since I'm not about to buy two sets to get the combination I'll have to make the 90's work.
Did I mention that my kickdown linkage bellcrank doesn't clear the Schumacher's either? :)