[MagicRat]

Most cars made in the last 20 years use metric fittings and flares. You want to use old-school standard fittings and flares. Both the 1960 and 1975 Pontiacs used such 'standard' fittings and flares. Most decent auto parts places will have these lines in stock, in pre-made lengths, with all the necessary fittings and flares included.

Don't use the metric lines! They have the same line diameter as standard but are not compatible.

All you need to do is to measure the length you need, get the closest size (but never shorter than you need) and bend it to fit. It's best to get a line bending tool to do this, although you can bend them around large sockets (from your tool box) to get a nice radius.

Also, note the lines need to have a couple of coiled turns in it where they go into the master cylinder. Unit-body cars do not need these, but seperate-frame cars, (like yours) do. These coiled turns allow enough flex so the body can move on the rubber body mounts (as it is designed to do) without breaking the new lines from metal fatigue.

Also, use proper retainer clips for the lines. If they are not secured properly, they will vibrate, fatigue and break.