Do 1/2 ton and 3/4 ton trucks use the same diameter brake lines?

I am asking because my truck is a half ton long box and all the brake line kits I found are for half ton short boxes or 3/4 ton long boxes. Any insight would be appreciated thank you.


1950 GMC 1/2 Ton Long Box
228-Zenith carb- SM420-bendix brakes