Re: 67 F to R brake line
My pre-bent lines didn't fit either and unless someone has the same distribution valve mounted the same way you do a picture won't do much good. Remember the Dist. Block can be mounted vertically, horizontally and to the left or right of the support bracket. Playing these might help you. You can also carefully bend the tubing by hand to fit. (fill the tubing with table salt not sand to keep it from kinking). Table salt will dissolve can be flushed away, wet sand will just cling to the tube internals.
My block was originally vertical and I had to get another bracket and lay it on it's side to get everything aligned, (67 manual front discs).
67 RS/SS 350, M21, 3:70 POSI, Hooker side mount headers, blue dot tail lights. owner since 1974.