Which pcm to use

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I am currently swapping a 2008 aluminum 5.3 with 58 tooth reluctor into a 2011 colorado. I have both pcms. The 2008 is an e40 with no DOD. And the other is an e38 from the 5 clyinder colorado. I believe the e38 will interface with the truck better, just not sure about switching it to a v8 after reading that operating system changes may brick the ecu. The e40 ecm traction control/ abs is complety different and requires a wake up signal for communication. I believe I could work around these. I would just like some info on which way would be best before building my harness

[5FDP]

Are you sure the 2008 computer is an E40?

Could have sworn the E40 stopped after 2006ish and everything beyond that for half ton trucks or SUV's was a E67 or E38.

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Ya. It has 2 connectors 1 grey one black.

[5FDP]

An E38 has one grey and one black. E40's have 3 connectors.

http://www.lt1swap.com/pcm_identification.htm

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My bad.