Correct wiring schematics

I recently bought the car listed above from an individual seller who had it as a "project car". The car has run fine until about a week ago and then it just would not start back up. Started looking under the hood and noticed some "shade tree specialist" has completely messed up the entire wiring harness to the whole car! There are double ground wires running into the battery and from the alternator to the fuse box and battery, there are little "jumper" wires bouncing off if this fuse and that fuse and there is even a jumper wire on the alternator! I am trying to find some color coded picture or diagram detailing how the wiring should be when done correctly! Any and all shared knowledge is much appreciated.