I am assuming you are talking about the rubber hoses, it should not make a big difference. Wheel cylinder or master cylinder diameter would though. I replaced all my lines and hoses, I used the same size steel lines but did not even think to look at ID on the rubber hoses.


Mike
1955 Chevy 6400 ex-flatbed (no bed now!) sold September 2023
In the Stovebolt Gallery
1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery
1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery

Sufficient unto the day is the evil thereof