72 K 20 Electrical Trouble

[reysteve]

Hi,
I am new here and I did search for people having similar trouble but I could not find anything.

My problem: My truck will not turn over as if the battery is dead, the battery is not dead. THe junction block has power, the headlights dont come on, the brake lights work. There is power at the ignition switch. The truck ran fine and then I parked it and when I came back I get this weirdness. I tried all of the things that I could think of. Thanks for any help.

If you need it:
The truck is a 72 K20 with a 350, manual trans. One owner, my dad gave it to me, he bought it new so it is pretty much stock