I have a 1981 Jeep CJ 7 with a 4 cylinder 151 cu engine. I need a schmatic that details the vacum hose layout

Answer 1

If there is not a decal under the hood that you can read, then gather up your note pad and pencil and trot on down to the local library.
Go to the reference section and look it up.
Most libraries now have either ALLDATA or MITCHELL ON DEMAND on their computers. A very good resource used by most professional shops. However coverage usually STARTS at about 1984.