A cam cannot BE 180 off because the cam rotates at 1/2 crank speed. So every crank turn, the cam is 1/2 turn off from the LAST time the crank came around
On a side note, Mopar engines do NOT FIRE the no1 plug with the timing marks "lined up" at 6 O'clock and 12 O' clock. That situation is actually no6 ready to fire, no 1 is 1 turn of the crank, putting the marks both at 12 O'clock.