Very possible with that type of gear. No easy way to find out either....gotta take everything off and pull the cover to verify! Yes, i know it sucks, but we all make mistakes.The heads were on but I never rotated it until it was all assembled I wondering if I used the wrong marks on the lower gear?
When i was putting the LS together i installed the chain dampener before putting the cam gear/chain on! I had to take the bracket back off, and pry the dampener off without screwing it up since it's a press fit !!!!