Nah the aftermarket tb's aren't drilled for the iac path. if you look at a stocker and a 58, you will see between the blades what i mean. this was causing his rear plugs to foul out. the intake has idle air paths that dump out in each runner. this also causes the infamous split BLM issue. I have links saved on my computer that took a dump.
edit:
http://members.cox.net/chipsbyal/page/idle/index.html
http://members.cox.net/chipsbyal/page/idle/tbi.htm
http://www.noid.org/~lj/PCM%20Tutorial/SplitBLMinfo.htm
http://www.injuneer.com/ScanMast.html