I'll add some fuel to the fire.
I used Inline Tube for all the brake & fuel hard lines. I bought lines first from nearly all the other makers of repro hard lines:
Classic Tube, Right Stuff, etc. Only Inline Tube had lines that fit and looked like the Buick originals. The only issue I had was with
the long front to back brake line. I sent my original to Inline Tube to copy and it came back fitting about 98% per the original.
It needed a little tweaking to get it the way it should be.
The lines were purchased over 15 years ago now, so things could have changed a lot since then. I had no issues working with Inline,
and have read feedback about them on some of the other forums.
Working on another non-Buick project now that will need a line set - changing from manual drum to power front disc.
i will post back what I find on that one, plan is to go back to Inline Tube. Per Walt, I should just bend them up, but I did one rear
axle line a few weeks ago and the time doing it, about 90 minutes cutting, bending, flaring, could be spent on something else.
Or I'm just slow!
Mark