Viking,
I had the same question the other day, same boat and bracket, let me look it up in my e-mail tomorrow for you. The height of the bracket will determine the actuators we use to fit under the bracket. Do you have a photo of the transom?
Here is a photo showing an M80 (The actuator heights are the same as on the M120) showing the height required with the standard actuator (10-1/8”) and if need be I can send you parts to modify it so it only needs 9-1/4”.
Another Tab, the 12"x12" with a short actuator can be made to fit with even less height on the transom and fits well on the 23. If you have not been there visit
www.classicseacraft.com I have worked with a few folks on Tabs for the 23 there. It is a great site for SeaCraft owners. Our phone is 954-427-1400
Tom
Bennett Marine