Rowing the Gears on a Third Gen Camaro

This is a naturally aspirated 1990 Camaro with a 370 ci LS motor running through a 6 speed T56 on pump gas.  Home built in his garage.  This is the current fastest time, 10.482 @ 131.9 mph. They believe the car has 10.20’s in it.  Either way, this is fast for an NA car, especially a stick!