I second the copper nickel line advice.

Several years ago I did all stainless lines on a truck and while it can be done, and when done it is nice, it is a whole lot of work to do and do right. The stainless is so stiff and hard to flare. It can be extremely hard to flare, and often impossible with a cheap flaring tool.

Most recently I have been using copper nickel line for brake and fuel lines and it is a pleasure to work with, and just as good or better as far as corrosion resistance in comparison to stainless.
A few years ago Fed-Hill was the only place in the US to get the stuff and they were (are?) terribly expensive. So I sourced some from England where it is common and I was actually reselling it here on the forum. I'm now out of that business because it's easily available at most auto parts stores, and good prices too.
The best prices I've seen recently are on ebay, search for "CNC325" or "CNC425" for 25' rolls of 3/16" and 1/4" respectively. The same part numbers work at most auto parts stores, and there are other lengths and sizes available too. The brand I'd buy today is NiCorp, and goes by those part numbers.

Flaring tool.
I've owned and tried several including a reasonably cheap OTC, a moderately priced Imperial, the expensive one offered by Fed-Hill, and lastly and best is the Brakequip as seen here http://www.brakequip.com/fitpdf/tubes_flaring.pdf
to read more about that try this thread. https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=750776&page=1

Bending tools, the best in my opinion are Swagelok (new and expensive) and the older Imperial, Eastman, weatherhead, and similar you can often find on ebay or junk shops/flea markets and so on.
Here are some pictures of good benders, ones that only bend ONE line size.
https://picasaweb.google.com/lh/photo/of_hHESuy8B1Dyn8gz-X2dMTjNZETYmyPJy0liipFm0?feat=directlink
https://picasaweb.google.com/lh/photo/dSVi-bznNWxP--lTT_ojE9MTjNZETYmyPJy0liipFm0?feat=directlink
https://picasaweb.google.com/lh/photo/LPJh7U_1xZLcYZLO1WLazdMTjNZETYmyPJy0liipFm0?feat=directlink
https://picasaweb.google.com/lh/photo/p2uf_0bOi74iZ0d8S70IQtMTjNZETYmyPJy0liipFm0?feat=directlink
https://picasaweb.google.com/lh/photo/toL5KCmXC0J0_kQbxx7-HtMTjNZETYmyPJy0liipFm0?feat=directlink

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-