Actually the masts are different sizes. Cost of parts include standing rigging, mast foot and base, etc will be difficult to nail down. I am not sure if old wire rigging will work due to age. Experience is at play here. Not sure if the spreaders have to be cut down. Not sure of the degree of the swept back spreaders are the same. Shipping cost of mast to buyer. There may be other issues but all I can do is point out issues and other things to consider.