Klepsie: You can't go by that. Monarch puts the lower number (or the number without the X) on the side with the lower matrix number. That may or may not be the A side. Think of Chess among other labels.
I remember WJIM, 1240 AM in Lansing, Michigan played "Sally from Syracuse" often during the summer of 1973 (I was then only 11 years old) - but they bleeped out "ass;" other stations in that area, most especially WVIC, 730 AM played "Sally from Syracuse" uncensored. I could never figure out why WJIM bleeped that until I heard the song on said competitor.
Maybe it was because of that controversy Evolution soon decided to pitch "Sally" as the A side? (Shame it didn't get up the Billboard Hot 100 Pop chart.)