New and need help GMC longhorn. Parking brake

[Steven R]

Hi there, My name is Steven, and I have recently purchased a 1971 GMC longhorn 3/4ton with a 350 engine.

I got my interests in these trucks at a young age and working on them with my late father. My first vehicle was a 1971 GMC 1/2 to 250 inline 6 3 on the tree. Between my father, my brother and myself we had 9 or so. I sold my truck when I was 18 and have always lock back wishing I had not done that.

I have been working on old sleds from John Deere for many years and they have a nice parts look up online and service manuals in order to do repairs and overhauls.

I need to get a list of parts for this truck's parking brake system, but am having a difficult time finding a parts break down with illustration. in order to see what I am missing so i can then in order what I need.

Can you please point me in the right direction on where I will find a complete parts breakdown and listing of all the different assembles/systems for these trucks.

At this point I need to get the parking brake working but some of the cable and attchemnt under the cab and bed are missing.