Found this at
http://www.gamefaqs.com"The following strategy was sent in by Tevern:
However, there is a way to kill Chunky, with almost no risk to yourself, and
all it costs you is $1,000.
Take a fast car to the entrance of the alley where Chunky is found, park and
get out. Run around to the back side of the alley, and jack Chunky\'s car. Take
it to 8-ball\'s shop, and fit it with a bomb. Return it to its place, arm the
bomb, and go back to the other side of the alley near your car. Walk into the
alley, and trigger the cutscene with chunky in his noodlestand. As soon as the
scene ends, target a Triad, and fire a few shots. This will panic Chunky, and
he\'ll bolt to his car. As soon as he does, begin running back to your car.
Chunky will blow himself up for you, and you\'ll be on the road cruising away
from the angry Triads.
Tevern"
Sounds cool