converting to power steering.

I am adding power steering to my 1965 Valiant Convertible that I am restoring. I found everything that I needed except the steering shaft. I know that I have to shorten the one I have to use it. Does anyone know by how much? It looks like 3 inches to me but I have the shaft removed and the coupler off (it needs to be changed too) I have measured the length of the shaft at 39and 1/4 inches. From the top of the shaft to the small hole near the bottom is 37 inches. If anyone happens to have one from a power steering car that is removed could you measure to either of the above and let me know. Because I am in Canada it is much more difficult to find parts.