lots

housing: say 400
weld on mounts: 400
custom tailshaft: 450

i dont know much abotu the LSD's but a new one for most models is around $1200
then setting up the lsd in the housing: 400

and its a good idea while your at it to put new bearings and seals in your housing: 400

we're up to like 3000 or so

rough figures, but you get the idea!

what you want a hilux diff for? hilux diff is huuuuggggeee