If your motor turned over backwards with the kinds of forces involved, it is highly likely one or both timing chains could jump a tooth.
Or broke a follower.
Why should Tre.. even pay for shipping? If Livernois wants their defective part's back they should ship it at their expense, re-emburse all cost back to the customer, and let him go buy a set of heads somewhere else.
As mentioned crank thrust is on the tight side but is within spec. Bearing failure does not introduce coolant into the oil. However coolant in the oil can and will destroy bearings. The root cause needs to be found, not just the collateral damage.
Do you have an adjustable spreader bar on your engine hoist? If you do you can surely pull the engine and trans together, adjust the angle as you are lifting and pulling it forward.