I may have exactly what you want. I have a 1987 YJ, with a 4 speed toploader ford tranny. I have a good Mercedes 240 diesel. Mounts are complete, engine has been fitted, and it ran and drove. Currently the engine is pulled, and I am refabricating the bell-housing to accept a hydraulic lever clutch. All parts are on hand.
Additionally, I have used a 5-cylinder manifold, blocked off one exhaust port, and fitted the turbo, so I was going to turbo-interecool it.
The RPM band of the 240 diesel perfectly mates with the gearing of the jeep with stock tire (30") or could work with a little bigger.
Body is southern totally rust-free and everything works.
It originally used the factory center mounted hydraulic clutch, which is prone to failure (did).
It is powder blue with factory paint, which looks good. It is in my shop taking up one bay, a space I could use.
The real issue is I just don't have the spare time to do the project. Even if I complete it, I really have no use for it when it is running. I already have a 4BT project, which I have ran for years in my 68 Bronco, and now pull to convert to 5 speed from automatic. That is a priority project.
$3000, and all you need to do is put the parts together and enjoy the fun.
Wayne
OM616.912