M_Boats: M17 year model differences

I have been looking on the net all over for Montgomery 17's .I notice that some models have a cut out in the transom for an outboard in the transom. Other models have a motor mount on the transom. The cut out for the motor looks to make the most sense to me. I assume that the difference is the year model. If so, what year models have the outboard cut out in the transom? Thanks, Tim Erwin         _______________________________________________