On some good salt, some more chassis tuning, and a bit more boost, I think this car can go 300mph. Also, the converter failed to lock up on the 276mph run so include fixing that in the list for sure.
When I shift this car, I let off the gas completely as the transmission will over run in the lower gears so it does not disturb the tires. I can still shift as fast as a manual box but I believe this method is easiest on the drivetrain. We are still using the stock Corvette rearend and suspension so anything I can do to make that stuff live, I try to make happen.