swapping a np8 into a np2

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has anyone did a swap of a np8 from a new style 1999 gm ext 4x4, 5.3, 4l60e into a 2003 chev ext 4x4,4.8, 4l60e that had a failed np2. the wire,switchs, dash, nuts are compleat in the 99 truck. can this be switched over with out to much head banging. i know the 03 is a drive by wire and the 99 is a old school cable. i think there maybe some bs with computers/wires on the 1999 np8 moveing up into the 2003 that may have some unforeseen issues with the wire/computers. the nuts and bolts/wire appear to be strait forward. any thoughts with this would be appreciated. thanks guys