Are the tubes in your Alan screwed/glued together like the one in this link? Just curious.

http://www.bikeforums.net/showthread.php?t=482506

Ask yourself "Can I really enjoy this tour worried that the stress may crack the frame of this vintage bike?" Probably not.

Nagging worries about equipment failure and problems on the homefront can turn a potentially great tour into a bummer. That sort of stuff should never be part of a bicycle tour, at least at the onset.