Swapping masts and re-rigging

[mariner2k]

Fair enough, makes sense. I'll work on that as best as I can and consult with you, with hopefully the pertinent info. I'll probably have some questions in the mean time. Most of my info so far would come from your book. Do you have any other publications to help figure loads, or can I find most of what I need from the RA book?
On a very basic note: Is it possible to use a narrower mast with the correct rigging?
The rotted mast is a 9.5" x 6.5" box, (tapering toward the top) and the newer mast is a 7.25 diameter hollow spruce mast, tapering down to about 5" near the top. The shroud lengths would need adjustment as a result of double spreaders. The spreaders should be able to go in their original positions. The stays will be identical. I'd probably go back to running backstays which the old boat/mast carried. If nothing more than for peace of mind. The mast heights are identical. Probably go with soft eyes over hounds.
This is all I have for now. I just wish to know if this endeavor is worth persuing? I hate to waste a good mast.
Thanks, Kevin