[Roadsters] Gas and brake line sizes?

[Ken Oxenrider]

I won't replace the short ones on the calipers cause I am going to go 
with the Volvo mods and the brake manifold designed by Mark Sedlack.  I 
am only concerned with the longer lines to front and back from the 
master cylinder and from the master cylinder to the slave for the brake 
pedal.  I also need to replace the both the gas feed line and the return 
line from the tank to the engine.  If know one knows the sizes offhand 
then I hope to get the auto parts guys to determine from a short section 
I can take them.

I am working mostly from  help on this web page. 
http://www.311s.org/pmwiki-311/pmwiki.php?n=TechSection.VolvoCalipers