Does anyone know the fitting sizes on the metal brake line that goes from the master cylinder to the rear brakes. I am buying some line wrenches and dont know if its metric or standard. Thanks

 

I replaced that line on mine last year, I'm 99% sure it was metric.

There is a location just behind the front wheel on the frame rail where you can tap into and I ran all the way to the back without having to remove anything large. I used bulk line and made my own flares because it was too long to use the pre-made pieces at the auto store. I also replaced the rubber hoses that cross over to the rear brakes while I'm there, I think they were pretty cheap from Rock Auto. Finally I replaced the two small lines on the rear wishbone, (from the flex line to the cylinder) and the line accross the rear axle to the other side. On mine it was all pretty rotten.

Jeff