Is the amount of overspray here too much, or typical?
It appears IMHO that you've done a pretty nice job with the amount of coverage. This is normally a challenge for painters today with the sort of guns available = HPLV don't produce the same amount of overspray as the older ones did. It appears that you likely used multiple passes and direct application which reduced some of the shadowing we would see on originals in some areas but it looks fine. It does look like your method of application didn't allow a shadow along the rocker panel to floor to develop as it would had it been sprayed on the rocker from a outside angle. This may cause an issue now as you apply the pinch weld black out.
Since I can't make out the detail in the picture did you apply enough sound deadener to the rear wheel well and allow it to "splash" overspray onto the frame and floor directly behind it. All too often owners/builders get too neat and mask the wheel well at the edge producing the look as if the sound deadener magically and suddenly ends at that edge. Not close to the original look at all - and results in point loss at shows
Would it have covered the seam sealer on the inside of the pinch weld? that would end up being covered by black out in any case, correct?
Floor to rocker sealer appears to be applied after all the painting so would not expect to see any exterior color or pinch weld black out
did i miss the timing on sound deadener on the pans? Should that be under body color? Sound deadener is always applied (for all restoration/judging classes, or no?)
Wasn't your car a GT? On Grande's, Mach I's and for some reason Boss 302's received the additional sound deadener on the floor s after the car was partially together - much late so you should be good
What about the transmission tunnel? is that supposed to be natural, or slop?
Trans mission tunnel, part of the floor was painted like the rest of the floor - no special attention or detail there that I've ever seen. At times, it appears, if the firewall to floor junction in that area was a poor match (read gap) a worker would slap on some ugly sealant there.