NJ2002WS.6

OK. I have a 2002 Ws6, do not know what happened but my engine started knocking and then seized. I took it to a shop and it is done. So my options they told me are to either get a used Ls1 engine for around $2,200 and and put it in or they said they can get me a brand new rebuilt Ls6 engine for $3,200. They also said a rebuilt Ls1 is around the same price. They are saying $1,750 for the labor. I plan on keeping the car so selling it is out of the question.

Here are my questions: ...