70 4x4 disc conv, which brake lines to use

[farmallboy15]

Hi,
I have a 1970 GMC k2500. I've converted the front dana 44 over to disc brakes. I've also added the power booster kit. Now I am needing to get new brake lines.

I know the lines to the master are going to be different but are the rest of the bends between a 70 and a 71 pretty close? What about diameters.

Bottom line what makes the two brake line sets different?

Thanks ahead of time!