Years ago I stopped using high and low to describe gears. With ten people five would call 4.11's high geared and five would cal them low so I switched to calling them shallow or deep geared. With a 2nd overdrive of .50 and nothing radical engine wise I would go with a minimum of 4.11 and probably 4.56. Look up the rpm your engine is at maximum torque and then choose a gear that will hold it there at the speed you desire.