Hi Hal, my first post at this site, so might not get to you if its moderated?
I have just finished installing a 2l zetec motor, and decided to do away with as much rubber pipe as possible, using it only to join the lengths of stainless steel tubes, which hopefully will outlast any rubber component.
It took a fair amount of measuring and bending, but I feel it looks better than hose.
The original pipe in the car as delivered in 1982 was a P.T.F.E. tube of 5/16" diameter, this stuff is just about indestructible, just as Caterham Zetec describes.
1982, zetec 2l, ali and BRG, and good old Clamshells