Just to add to carl's post.
deburring the end of the tube completely is very important, do a good job and make the tube square, meaning 90 degrees from the sides. But chamfer the outer edge so it can roll in.
If the end isn't square to the tube the mandril will be started crooked and you won't get a straight first press.
The idea is to make a buldge in the tube to start the end folding over to make the double flare.
If you squash the tube in the clamp a bit when making a flair, then if the flair doesn't come out good enough, and you cut the tube shorter, you will have a hell of a time flaring the area that was in the clamp and squashed.
Take care in positioning the flairing tool over the tube get it centered and square.
Don't forget to put the flair nut on first, I don't know how many times I left it off!
Eastwood has a good tubing bender based on vice grip pliers that is great for tight bends.
Check my web page for First Gen Camaro suspension info:
David's Motorsports page
First Gen Suspension Page
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer
[This message has been edited by davidpozzi (edited 02-11-2001).]