I must be a real dummy cause the wiring for dummies article only help a little.
The info I have locate on the matter says almost all of the connections will be at the c100 on my 3rd gen. So I think I can follow this diagram I have and work this out. But what is connected at the c207?(bulkhead under passenger kick right?) Do I just remove most of this? Trace down what was connected to the ECM and cut it off?

Also what about VATS? I still have it, although bypassed with a resistor. How do I hook this up or do I have to delete it from the PCM? (I know it is easier without it I just don't have the cash for tunercat right now)

 

for me, the c207 is where i connected the following:

torque convertor clutch control
park/neutral feed
diagnostic request
SES
serial data
power feed for both injector (2 wires twisted with a blue and a green i think)
power feed for ignition

i think that's it. maybe a ground too, not sure.

don't know about VATS though...don't have it.