disco box

hello all . i have a 84 110 swd . curently has a 2.5 daihatsu engine lt77 crunchy box an a 1.6 transfer box . needless to say non of this works to well . i have just got a disco 200 tdi eng gbox tbox prop shafts rad intercooler to transplant in . now my gearbox is a bit shot so i want to fit the disco box an transfer box aswell . i now the leavers are further back so will loose the center seat . but r ther any other problems that will halt my plans . ive serched the univers an get conflicting ansers an carnt find a picture of one done . thers to many hills in cornwall to live with this old engine an box any longer . thank you for any advice