stranded on the interstate. Ford dealership, stated the truck threw a rod. They took engine apart and ordered a new engine block. They called me today and said it was put back together and ready for pick up. Should i demand a new truck or am i ok to go with the replaced engine. Any affect on retail. I know i would be concerned about purchasing a brand new vehicle with a new engine.

I purchased 2018 F150 and 400 miles later truck breaks down.  Towed vehicle
to the dealership and i was told the rod broke (threw a rod) and most likely a
bad cylinder. They broke down engine and ordered another engine block.
Should i demand a new replacement?  Should i be concerned with value of
truck with replaced engine?   I have know knowledge of dealership's
technicians abilities.  I feel more comfortable with truck coming straight from
manufacturer.