disco I front axle on a '84 110

hi guys
i recently broke the right cv joint on my 110 (1984) with a lot of damage (swivel, stub axle and hub are all dead)
i have a spare front axle from a '89 discovery
can i swap it in the def easily ? i think i have to keep the brake rotor and caliper from the def, but is their any other issues ?

thanks

you need the disco radius arms too as your early defender ones are thinner

thanks for the info, i manage to found a pair of wide ones to fit