Knowing that you have a ball diff in the front explains a lot. Your car will immediately drive easier once you lock down the front drive. As mentioned before, there is a mod you can do if you don't have the spool yet. Remove the diff balls and either compensate fitment with shims or cut some cardboard stock discs to act as friction plates/spacers on each side of the diff half and tighten it down.
I notice that you are hitting the brakes at the end of the straight too. Are you concerned about traction rolling or still building confidence in taking a fast corner? A lot of crashing there so it's probably intimidating to carry as much speed as the car can handle. Either way, once the car feels easier to drive, your confidence in it will improve as it becomes more predictable.
VHT is very good stuff and you probably don't need much saucing. Perhaps try applying your sauce at the beginning of the race prior to yours and wiping it off half way through as you head to the track for your heat. The duration also is dependent on track temp and how heavy the spray is. Since you are in sunny Florida, 36's are probably the most consistent tire for your track.