Mechanic Job in Southwick, Massachusetts

I have a 2004 Mazda RX8 (automatic). Bought it 2 months ago and have replaced: radiator, air filter, spark plugs, wires, and new tires. Then the engine lost compression so I bought ALL NEW parts from AtkinsRotary..... and had engine rebuilt. After rebuild, that mechanic has been unable to get car to run. He got it running and it idled for approximately 15 minutes and then stalled out. Cannot get it running. He has checked the sensors and still nothing. I have put a lot of money into this car and would like to find someone SKILLED in working with this type of vehicle that may know the problem. Vehicle has been towed to my home in Southwick.