Line a large baking sheet with parchment paper. Set aside.
To a medium bowl, add cream cheese, cinnamon, and salt. Using a hand mixer, beat the mixture on medium speed until light and fluffy, about 2 minutes.
Add the cake mix, Fireball, and chopped pecans to the bowl. Beat for an additional 1 to 2 minutes, or just until fully combined.
Using a 1 ½ tablespoon scoop, scoop out the mixture and place each portion onto the lined baking sheet. (I made 32 truffles.) Using your hands, form each into a round shape.
Place the truffles in the refrigerator for 30 minutes, up to overnight.
When ready, add the almond bark and vegetable oil to a microwave-safe bowl. Heat in 20-second increments, stirring after each, until the bark is melted and smooth. Let it sit for 2 to 2 ½ minutes to cool slightly before dipping.
Place a wire rack on the counter with a baking pan underneath it, and set out a parchment paper-lined baking sheet.
Take out only a few truffles at a time from the refrigerator to maintain their firmness. Place the truffles onto the wire rack.
Carefully pour the melted almond bark over each truffle. Then, gently transfer each one onto the newly lined baking sheet. Repeat with the rest of the truffles. (If the almond bark thickens, reheat it briefly to keep it smooth.)
If desired, decorate the truffles with an additional drizzle of almond bark and/or a sprinkle of cinnamon.
Place the truffles in the refrigerator for about 30 minutes, or until set.