How does one go about domesticating ferile kittens?

The dh brought home 6 of them. They are approx. 8 - 12 wks. old. and want no
parts of being picked up - hissing, biting and scratching ensues when you
try. They had been living under a friend's porch but were upsetting the
resident 22 yr.old (not in good health) cat so they had to be moved
somewhere else.

Are these guys too old to tame? How does one go about doing so if possible?

W