Possibilty There are companies who prebend brake lines and fuel lines out there. Do a Google search on it and you should find quite a few places. Maybe a line for an AFB equipped early '60's car would be right?
Since AFBs never came on 350s it is not likely that you will find a pre-bent line. A line for a AFB-equipped 340 might possibly work.
Bend you own! Tubing is dirt cheap at any "real" parts store. Benders are not that expensive and you can get them at all sorts of places--that "real" parts store, or at a home improvement store, off the Snap-On, Mac, Matco, or Cornwell truck, etc. If you are careful and clever, you won't need to cut and re-flare the tubing. Just buy an appropriate length. Actually, buy three, 'cause you're bound to screw a couple up at first. Don't worry, like I said, it's dirt-cheap.
