Help w/ Engine Swap: 3.2L into 1999

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weighing / pricing all of my options for replacement engines in my '99. i'm familiar with what's involved in putting a 3.4L into a '99. not sure about a 3.2L; maybe some folks on here know better than i do.

here's my best guess: the 3.2L is basically a 3.4L with a smaller bore. the 3.2L's use eGas and VarioRam. i already have exhaust that will support a 3.2L, so that leaves:

ECU Programming
Throttle Body
VarioRam

my guess is that i can use a mechanical throttle body from a 3.4L and ECU programming identical to a 3.4L. i can then run an extra wire from the DME to the VarioRam actuator and i should be good to go. i am working under the assumption that any 3.2L from 2000-2004 should work fine. am i missing anything?