I've had my 1985 W460 for a while. I love it, but the old OM617 has lost most of its former glory. I gave it one last service, replacing all filters, oils, and doing a valve adjustment. Clocked it 0-60 mph in 46 seconds. Engine swap it is.
I also have a 1993 W124 with the NA 300D OM606.910 engine. The engine runs great, after getting to the bottom of the hefty
diesel leaks. The engine only has just over 100k miles on it, but the rest of the car isn't so good. A really bad paint job, lots of dents, some rust, and none of the electronics work. A perfect donor car.
Together with my dad I'll be performing the swap at my parents old barn, on a concrete killing floor. I find it suitable for the task!
I should say that when it comes to engine swaps, both me and I my dad are happy amateurs, but we figure getting the engines out should be pretty easy going. Famous last words?
I intend to keep the 722.4 tranny out of the W124. Mostly because that's what I have - it's conveniently bolted to the OM606 engine already. I hear it's not as sturdy as the 722.3, but I hope it'll suffice.
More pictures to come as we go along, here's an appetizer!