Im no expert but before I did anything I would get that engine to another shop for a second opinion. If your not experienced enough to look at the cylinders wear and spec them yourself...then you definately need other opinions. Not to insult or put down your current builders but if you dont know them well ,how do you know they are not getting over on you for the business. Many times especially with regards to machine work and builders have I gotten 2 different opinions which made me research a whole lot more till I got a good census and prrof with my own eyes. JMO.