Thanks for the info Bill.
It's a 1973 20' cc.
It had some transom work done by the previous owner. I actually started to take it apart yesterday. The previous owner had it raised to 25" but the job was not done well. They put 2 steel plates and did the 5" raise using fiberglass as seen below. Look at all those holes, and none of the bolts had 5200.
Steel Transom Plate that was put on the outside and inside of the transom.
exterior transom after I removed the steel plate. Looks like the blue transom is the origional 20" and then the 5" addition.