And poor routing of the intercooler and air filter. Tough to align, be sure to use a dial indicator. Core plugs - Although it sounds like a High School shop class mistake, the head is aluminum and the original plugs were metal. So this is not abnormal. But it is costly if not covered under warranty, so check it carefully.
Advice Find a car that has had minimal modifications.
The head isn't that strong, so if you are looking at bleeds and other performance enhancement tricks, look to the Turbo I, II, or IV or even the Maserati-Chrysler DOHC 16v engine from Chrysler's TC by Maserati. Mine never had a bleed or altered computer. Take it for a thorough test drive and park it. Look for leaks and overheating problems. Have it inspected at a reputable Chrysler dealer who has had some experience in this engine.