If you do spend the time and money to go to Montana, you may or may not get the results you want.

Best case, you get one of the engines in whatever condition it happens to be in.

Winning a lawsuit gets you a judgement that may or may not be enforceable. State laws for civil matters vary and I have no idea what they are in Montana. Most likely though, you will waste a lot of time and money and still have neither engine.

In this case I think the bad guy wins.