AMO 2027 Grades 8-9 SET 12 - Self-study Question 4

$X$, $Y$ and $Z$ are distinct non-zero digits used to form the two 3-digit whole numbers $\overline{XYZ}$ and $\overline{ZYX}$ so that $\overline{XYZ}-\overline{ZYX}=297$. How many integer values of $\overline{XYZ}$ are possible?