I wanted to pick up a stock 302 engine for my 1991 Mustang GT that I can build off of craigslist for like $400 but I wanted to know if there's anyway of checking for compression when the motor is out of the car because sometimes you can't just take the sellers word. Also is there anything I should look for ie; milkshake, burnt oil, hole through the block, crusty water passage, burnt wiring, etc........