if youre absolutely positive of this part, "Even rotated the motor over a couple times via the crank bolt, and all the dots lined up." Then no need to check it again. But if any doubt, its not too hard to pull the covers and check it again.

Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451