If you are determined to bring an 8 week kitten as a friend for Tucker, the first thing is a vet visit. These kittens could have worms, fleas or other parasites.
You will have to very closely supervise Tucker with the kitten, because he could hurt it badly without even meaning to. You will have to separate them when no one is home and at feeding time, and I would do this until the kitten is old enough to defend itself - as I said, about 12 weeks at least.
Tucker may be fine with the kitten, but male kittens his age tend to be very rough in play, and 8 week old kittens are very fragile.
Is anyone home at your house during the day?