I guess i am the most apropriate to
you since i'm your age.
265lbs at 6'5'' ? Most probably there is no special training plan needed to improve your vert, you need to lose weight, unless you are one huge lean muscular beast.
Tell us a bit more. What is your body composition roughly? Are you training currently? If not when did you stop training? What is (was) the training scheme u are ( were most recently ) doing and what are your current weightroom numbers?
Also 97'' reach , you must have realy small hands, my reach 95 1/4'', standing at just 6' barefoot.
But damn , you'd make an awesome PF