What does it do if you disconnect the IAC when it is idling?

When cold it is likely to stumble and cut off, when warmed up it should not make any difference. If it just cuts off no matter what, I doubt the IAC is the problem. You may need to do a idle adjustment and start it from scratch. I tried several methods and finally found one that actually worked. I think it was in a Ford bulliten or something I Googled.

I have not read the full post, so forgive me for jumping in like this.

I went around with my set up when I put on a H/C/I and then a Novi. Things got interesting and I learned ALOT!