gt, you seem to be one of the rare ones with an unusually high max. However, if tested, you'd probably find your stroke volume is lower than average.
Jim Ryun(first high schooler under 4:00 in the mile) had a resting heart rate of 72 when the norm for a world class runner would be 35-45 bpm.
His max was said to be around 240.
"To give anything less than your best is to sacrifice the Gift."