Can 1/4 inch tubing be used for brake lines? I can get all the fittings and lines I need for free but it is 1/4 inch. I am using a 37 chevy front end and a rear out of a Chevy S-10
Yes, 1/4 brake tubing is very standard for early cars. So long as the line is rated for this useage then you are just fine.
I've been using 1/4" lines because about 15 years ago I bought a huge lot of #4 AN stainless fittings, nuts, ferrules and lines at an auction. They work fine.