ordered, installed it several years ago. It was was available in 5/16 and the High performance 3/8 dia. The only problem is installation. They also stock factory pre bent brake lines... again that assumes the 66 is same as 65.
Factory installation is done on the bare frame, before the body is installed. It is nearly impossible to install fuel line correctly with the body in place. I say nearly impossible because there is always one individual who can find a way to do anything that is impossible...if they try long enough, hard enough - just to prove a point.
... Labor Omnia Vincit ..