Carb Tuning / Vacuum Problems?

Unfortunately many people claim things that aren't true. Any time I buy a car and the person claims the engine has been rebuilt I question them as to exactly what was done and ask for receipts. Hate to have to be that way but you know how it is these days, it's hard to take a persons word. The compression test is a valid indicator of an engines condition. With yours being so low there is something drastically wrong there. Until it's corrected it'll never run "right".