Long bed brake line location

[ab_70chevy]

Iv got a '70 long bed C10. Turns out the connection between the line that runs from front to the rear and the hose to the junction block is pretty well corroded and is just seaping out. My question is, where is the union on the line at the front? My truck is pretty low, and I did not have a chance to get it on jack stands and crawl under it. Im thinking I would like to get some straight lines and bend them myself until I can save up enough cash to buy some nice stainless ones.
Id appreciate any help
Thanks fellas
-Andrew