Fuel line variations?

[cboss70]

I see 1967 gas line listings for a early and late two piece 5/16 lines,  one piece versions and a 3/8 two piece version.  What is the proper one for a stock late GT500? Thanks!

[JD]

Believe a late '67 Shelby would have the two-piece but 5/16 - which may not be reproduced or you may need to find another source.

[Bob Gaines]

67 Shelby's had the 5/16 fuel line.No substantial evidence to support 67 Shelby with anything but the 5/16 fuel line. After 67 Shelby production ceased  possibly 3/8 was maybe used on very late 67 Mustang production on into 68 production year.