MAF Speed Density MAF to plain Speed Density

[dec010974]

Hello to all. I currently have a Speed Density Tune on my LQ4/TH400 Swapped 1971 C10. At this time, I am using the MAF Sensor in place of the IAT Sensor used for Speed Density Tunes. I want to remove the MAF Sensor and use the IAT Sensor. Question #1-Which wires are used for A & B on the IAT Sensor connector? From my sources, the PCM uses Pin#25 and Pin#57, on the red PCM, C2 Connector for IAT Sources. Question #2-Is this correct? Question #3-Once the switch is made, will the tune need recalibration? Also, does the air have a higher temperature inside the intake manifold, rather than the engine bay? The Pictures are a depiction of the changes I want to make. Thanks in advance. Clark.