After alot of hard work and greasy nights my blown engine is now breathing fire again. #6 was shot and the rest were not far behind it all new pistons were installed. I just started taking it down and replaced every part in the engine except the cam and the crank which checked out to be just fine. I set the timming to 14* which is stock and had the pump totaly rebuilt to stock plus 20% Injectors were rebuilt also. this thing runs fantastic!! never was this good. I plan to advance the timming to 15 or 16 after 10K miles. and thats it no more tweaking or tuning. that will keep me within the design specs of the Cummins engineers. I have to thank several friends who were willing to help me get things right. its been 5 weeks since she blew and while I am proud to say I did it. I have a new respect for this engine and its design. Hats off to all you proffesional mechanics You do have a very difficult but rewarding daily grind. From now on No one will touch my engine. if it blows again it will be my fault and not my fault for trusting others. I do have a question I have read about a 37 block. I am afraid after all of this I may have one!! I see some stamping on the block drivers side that has some other symbols and 3 7 are part of the numbers or symbols. do I have a 37? I will go look again at the exact numbers or symbols. Thanks for the input. 
