I am looking at the possibilities of putting a diesel in my 86 300E 5 speeder. I may have a donor engine from an 87 300D but the obvious question is will the 5 speed be adaptable to the diesel? I don't know of any application that had the Turbo Diesel of this vintage matched to the 5 speed or if the gearing is even a decent match. Is the rear end ratio close? How much electrical box swaping is involved? Am I nuts? ...I mean how nuts is this? BTW Is the engine compartment vastly different?