Engine problems.
First used engine was installed and when started was crazy knocking like a son of a ....... and making all sorts of internal not so nice noises.
Way too much to deal with.
This one was yanked and another used engine sourced. It delayed it 2 weeks from when originally finished, but sure nice to have it back with a strong engine in it (50K km's, an mechanic gave a 1 year 20km warranty on it)