So my rebuilt engine is in, started on the first try but it's running
rich.

Any ideas?

It as the original AFM, Idle control valve, stabilizer unit, and
oxygen sensor, etc..
Could it be as simple as I need a new O2 Sensor?
if so should I get the splice in kind or the whole wire?
My mechanic tells me that it might be the wire from O2 sensor from all
the years of replacement slicing..
http://www.van-cafe.com/home/van/smartlist_985/oxygen_sensor.html

My mechanic tells me the original Breather Tower top comes off to
easily.
He opened and the top inner components of the unit seem to be
deteriorating.
Does it require replacement at $90 for the unit or can it refurbish it
somehow and seal the top?
http://www.van-cafe.com/home/van/smartlist_924/breather_system.html

Thanks,
Robert
NY