Dfrank,
It may not be worth it to get it cleaned for 150.00 for not removing the manifold. My car only had 65K on it when I did mine and it was very dirty, beyond the point of cleaning like this. You can see pictures of how to take it all apart here:
How Tos
and here is a pick of the nasty buildup:
LIM
I ended up having to soak it for a while in some oven cleaner followed by a pressure wash to finally break through the buildup. None of the carburator cleaners worked well at all for me.
Good luck!