1-3 are spot on, let me touch on #4
id recommend you get the tune installed before you go drag racing. we needed to create that tune due to running a little on the lean side at the track, nothing like the 17+afr but we were dipping into the 13's where i didnt want to be. we want to keep the afr in the 12's for sure, with the tune you should be around 12.5-6 afr which is perfect IMO. datalogging will let us verify many things on your car. get the tune in, go to the track and enjoy while datalogging, then send over the files and i can interprit for you and if needed we can have the tune adjusted specifically for ya.