Use the AEM MAP, not the GM one. I have seen them wonder on me. The GM IAT also has quality issues, (surprise, surprise) but it is at least usable after you test it. Measure the resistance vs. temp values of your sensor before using it.
The AEM EMS is incapable of operating in closed-loop using your narrowband. This is one of the big drawbacks of the system. If you ever want to be in closed loop, you need a wideband.
Some argue a well-mapped EMS doesn't need to operate in closed-loop. I beg to differ. This might be the case with race gas, but pump gas varies quite a bit!
You will also need this:
http://mrcontrols.com/products/matplate.htm
It puts the IAT in one of the best places possible.
Don't forget the sensor pigtails for the MAP and IAT.