I have a 55 1st series and am putting in an new single master cylinder like the original and stainless lines. My brake line to the master cyl is a 7/16 and it appears the new master cyl is a 1/2" connection. The adapters that I have seen both online and at the auto parts places don't seem to be long enough to reach the inside of the master cyl to make a good compression connection. I expect it will leak if it isn't long enough. I am not sure why the new one has a 1/2 in connection. Appreciate any advice.