The surgical apparatus can include a guide body including a guide track, a guide block coupled to and movable along the guide track and defining an aperture, a first supporting member comprising one or more first engagement features attachable to an inferior portion of an acromion bone, a second supporting member comprising one or more second engagement features attachable to a first superior portion of the acromion bone, and a third supporting member comprising one or more third engagement features attachable to a second superior portion of the acromion bone. The surgical apparatus can include a delivery member extending through the aperture, the delivery member extending and movable along a delivery member axis extending above the first supporting member where at least one of the first supporting member, the second supporting member, and the third supporting member are adjustable.