Advice on buying junkyard engines?

One of my son’s friends buys junkyard LS motors. He throws them in his car as is. Doesn’t pull a pan or valve cover. Hooks up his turbo setup and runs the crap out of them till they blow up, then does it over.

If you take a jumper box you can usually get the mileage to light up in the speedo. You can run a car fax if you get the vin.