Well they ran a compression check and compression was fine all the way around but 7 out of the 8 plugs had oil around the threads. He feels it's the rings and suggested replacing the rings and pistons and taking a look at the block once they get inside to see what is causing all this overheating issue. In fact it jumped up to 230 in my 15 min drive to the shop. Not sure what I'm going to do at this point on whether to rebuild or drop a crate engine in. He wants 2500 to do the work. First thing I need to do is find out if this motor has matching numbers before I make a decision. Any idea where the numbers are located on the 289? Thanks.