Mini High Tourque Starters

Need some help Mopar people; Has anyone had issues installing a mini high tourque starter on a 67-88 318 engine. The mini starter I installed, the Bendix dose not engage the fly wheel approx 1/8 to 3/16 shorter than the original standard mopar starter dose. Dose not even engage half of the Bendix teeth and should engage about 3/4 of the teeth. any idea's.
Thanks