The Cessna 150 with the Lycoming 150 hp engine mod is not certified for spinning. The heavier engine required the battery to be moved to the tail. The heavier bits at both ends created addition polar inertia such that the airplane no longer had acceptable spin recovery characteristics
in any case spin training has no place in ab initio flight training. Instead all of the emphasis should be on spin recognition and recovery. A deliberately entered spin with pro spin controls maintained after the aircraft departs is an aerobatic maneuver and should be thought by an aerobatic instructor as part of a basic aerobatic course.