727 shifting in drag race??

VERY amateur racer here. I have a 440 stroked motor in my 73 scamp. I rebuilt the transmission and put in a Transgo2 shift kit. This year we have only had it out to the track a couple times and allowed the trans to shift automatically. It shifts quickly 1-2-d which may need to be remedied later. We are planning to manually shift in our upcoming races. I have been instructed that the best shift point should be 5800 rpms for this setup. At least start there. My questions are, 1. to shift at 5800, what rpm should I set the tach light? 2. Do you keep the pedal floored during the shift? What are the general concepts to be followed. This is not a bracket race but just Friday test and tune on no prep track. Thanks for any help.