what im asking is what would you do with a series III if you had disco parts available, or would you restore the series III??

ok i have a series 3 in the field it would possibly run with a few bits and bobs... but i also have a 200 tdi discovery in the field it if pretty gone rust wise ... so im wondering what i could do with them i was thinking of mating 200 tdi with series 3 gearbox but im not sure if i want to do...