I am putting in the motor mounts for a volvo 280 leg with a chev 350 in a full resto project. The previous owner did a partial resto and replaced the motor mounts and they were put in a little askew. What I need is the distance from the transom wall to the centre of the mounting stud in a line. Also I would like to confirm that the width centre to centre is 22 1/2". Does anyone have a diagram for this?