I searched the forum for advise but I haven't found a situation like mine.
My ex blew the engine in her 1989 325i. The block pours water, rods are broken, and every mechanic who looks at says buy another one.
I found a 1991 318i with a good engine and a trashed body for cheap. I know I'm downgrading, but I only paid $600 for 318i with 100k miles - and I was able to drive it home.
Are these engines interchangeable? What all do I need to know to exchange engines?