Our nightmare trip/blown Jasper Engine

garyemunson wrote:
If the engine spun a main bearing, there isn't much other than faulty engine assembly that could have caused it. Running an engine lean won't bother the bottom end. A blown piston however........

Not to mention fat block Chevy's are not hard on main bearings anyway and their oiling is pretty rock-solid. If it truly spun a main with such low miles is was most likely a line bore issue, bent crank, or too tight clearance to begin with. The only "tune" related issue that would really effect it (referencing the MAF sensor comment) is if it was running pig rich and diluted the oil with fuel.....even then they will usually take out a rod bearing before a main. I really hope the OP gets some relief on this, but I know Jasper is pretty tough. Good Luck!