are the main bearing caps in the correct direction and order? are the rod caps in the correct direction along with the rods and on the rods they came off of? if they were honed, they still need to go with the proper rod. did you mic on the bearings just to make sure they are what they say they are? they are most likely right, but no harm in making sure. did you use oil or lube on the inside of the bearings and crank journals? may seem like some stupid things to check, but just throwing some out there.