I just finished doing all my Running Rigging lines on my 2000 340.
I had all mine made at Defender Marine in CT, they had the best prices for all the lines you might want and for any upgraded lines you might want to do. Wait for one of their many sales and it gets even cheaper, there's one right now until mid June I believe.
As far as the lengths go for any Eye Splices, they require adding an extra foot to the needed length, this depends on the size of the eye you need.
All my Eye Splices were 3/4 inch.
I added a foot more to all the lengths, so your 114 foot Jib should be 115. I don't think you would need much bigger than 3/4 inch eyes.
And your right, as good as the Hunter Manual is, it does omit the Outhaul length.
Mine (original) just barely reached into the cockpit. I just doubled the boom length and now it's more than enough.
I can't help you with the Main Furling line.
Unless you plan on climbing the mast anyways and replacing the lines by feeding them down. You could sew another smaller line to the end and pull the original through and just measure it, then pull it back through again. Just go easy with this process and sew tight and use thin rigging tape to hold the ends together as you don't want to break it apart up in the pulley. I had to do this for my Outhaul Line as it was to short and I needed the extra length or I would lose it in the boom.
I replaced all mine by sewing the old and new lines together and gently pulling them through. You just need to cut the old line eyes off, use a hot knife to blunt the end and sew the new line on.
It's not a bad project to do on those days when you aren't out sailing because the weather just isn't right. Take your time with it.
Hope this helped.
