i know its been done before but cant find one that answers my question. i have an 84fj45 troopy currently 2f standard 4 speed tranny. not liking the fuel economy in it at all got it down from 25l to 21l per 100 km. but i want to put in a diesel money is an object so im considering a 3b out of a rusted out 83 bj42 that was given to me for parts also running standard 4 speed both engines are 12v. am i right in saying the engine and transmision mounts will be the same as they are both 40series cars? also apart from pulling out one engine and puting another in what do i have to do? will the tail shfts need to be lengthend or shortend? is it legal? will it need to be engineered? is it worth it?