Started car--idle issues

The car seems to be trying to idle, but can't quite succeed.
10* base timing with spout out.
we adjusted the stop screw a bit to get it to keep idling. It keeps stuttering though. I don't know if it's a cold start cycle or what, but it seems to be going up and down in the RPM's. My only thought is that the exhaust is choking it because i've go the turbo headers and they point up towards the MAF at the moment. This is a temporary setup until i have the turbo on and the other intake, but do you think that maybe it's just not getting the air it needs? I know after it's running for a couple seconds I pretty much had to get out of the garage, even though i have a fan pointing right at it.
Any other thoughts?

uhhhhh, errrr, hmmmmm....
It's not exactly stock, like i said, turbo, and i don't have that part of the exhaust fabbed up yet, so it doesn't have o2's in at all yet. I thought the motor was supposed to learn it's own idle though, without the ratios. Also, the IAC, i don't know which one that is. Is that the thing with the little plunger that i put in half way? I do'nt have smog either.