[SIZE="3"]I got the rear line and junction block from inline tube. Here are some part numbers.
...TH-542
Rubber Brake Hose - Chevy Pickup
1967-70 Chevy Pickup 2wd 1/2 ton, Coil - Rear Hose
OEM Rubber
$26.00
...TH-910
Rubber Brake Hose - Chevy Pickup
1971-72 Chevy Pickup 2wd, 1/2-3/4 - Rear Hose
OEM Rubber
$32.00
All brake hoses are DOT approved and manufactured to exact factory specifications. These hoses are for stock applications and are only available in the stock lengths. For custom or modified hoses in longer or shorter length see the stainless braided hose section.
Here is a link to their site...
http://www.inlinetube.com/
The Chevy Trucks are listed toward the bottom of the application lists, seperate from the passenger car listings. Hope this helps.[SIZE]