I just replaced the narsty old HP fuel lines on top o' the engine with
5/16", not 7mm, lines from the local Kragen. They fit snugly but not so
tight as the 7mm. When clamped, they can't be moved around at all. Any
problem with this? Yes, the new ones are high pressure rated for fuel
injection systems. No leaks, either.

Thanks all--

Geza