Too rich 5kcstq after reassembly

[Barry Babcock]

Okey-dokey.
I'm trying to put the finishing touches on this already waaaaay too long 
"fix everything" project on my '87 5000cs TQ:
    -Replaced injectors
    -Removed and replaced all intake manifold gaskets
    -Epoxied broken airbox, so hopefully it will seal now
    -Replaced hydraulic lifters, timing belt, crank seal, cam seal, 
water pump
    -Replaced radiator hoses and v-belts
    -Coolant flush
    -Oil change
    -Cleaned ISV, throttle body, and all the oily goo off the front of 
the engine that I could get to.

Once the intercooler was reconnected, I was able to start the car and 
get it to rev, but it won't idle.  I ran it for a couple of minutes and 
noticed a black sooty spot on the concrete behind the tailpipe.  It 
wasn't running rich before I started this project.

As far as I can tell, I've got everything back together the way it 
should be.  I set the timing by putting a long socket extension in #1 
cylinder and making sure it matched TDC as indicated by the balancer.  I 
set the timing belt sprocket mark to match the edge of the valve cover 
as it says in Bentley.
I got the distributor housing aligned with the rotor mark while the 
timing belt sprocket was still lined up.  I can see the "0" lined up on 
the flywheel.

So, when I put the cam back in yesterday, should I have mated the 
distributer gear teeth to it in a specific way?  I couldn't tell if 
there was a preferred way of mating the cam gear and the distributer gear

Is there a specific amount of advance I should dial in to return it to 
original specs?

Or should I be looking for something besides the timing, like a vacuum 
leak perhaps?

Thanks a lot for the help guys.  This list rocks.

-Barry