I just bought my boat for this year, its a 1970 steury v hull, will make an excellent duck boat but the only problem is they guy i bought it from told me it was a 15 inch transom. When my brother in law picked up the boat and got it home I discovered it was 20inches. I just got a short shaft 25 from my buddy . What can i do to make this work besides a extension kit for my motor. Would it be ok to cut down the transom?I also thought about a jackplate in reverse but i dont thing i would be able to tilt the engine up if I did that