You will be fine. It occurred to me that if you want to change the leg length you may need to change out the shift shaft. The only way to change it is from top of the leg with the powerhead removed. So if you have the part you should change it when you have the powerhead off. Just FYI the photo (of a 1956 Johnson RD18) shows the top of the shift shaft and attachment to the cross shaft from the shift handle. Photo also shows the end connection of the water tube where if connects to the engine block. I don’t know what is involved if you need to change the tube for a longer one as I have never messed with that.
