thanks y'all!
still ain't got time to fill in the details, but here's a quick summary of where i'm at:
everything's been running and driving fine-ish... the idle's set at 700 but it's been hanging around 475-500 (i'm guessing there might be a vacuum leak somewhere because i ain't getting a IAC code
). the message center keeps flashing the red battery picture although the battery & alternator test fine. i think the speedometer calibration is off because sometimes, it ain't mathemetically accurate to the tach (i offhandedly remember certain speeds/RPMs/gear for my truck from when i was considering a transmisison swap). as to how much it's off, i'll have to sit down with a calculator & cypher it out. the tuner says he put the correct tire size & diff in the tune, so...
that's about where it stands as of now