Hi, I am looking at a 406d for sale that is currently having engine troubles...

Trying to find out more about it, specifically, what diesel engines could go into it easily...

I believe it has a 2.4L 616 series engine.

After reading around, it seems that I could possibly put an om 615/616/617
into this van...

The engine looked to be the same as an early 70's 220d I once had...

Basically, I am interested in learning what engines (that could be potentailly found in a junkyard in the states) would make for a (relativley) easy swap..

Not that I mind going slowly, but I wouldn't mind having a little extra power, as top spd is about 50mph or 90kmph...

How difficult would it be to put in a 5cly engine from a 300d / 123 series?

What would you suggest for a junkyard engine (keep it diesel please) that would fit or not require too much fabrication and still give just a bit more power and mate up with the tranny.

Thanks for any input!
Greg