Need help choosing gear ratio

[ProTouringNyC]

Well this is my set up 12 bolt with 4.11 gears 18 inch wheels tire size 265-35-18 BFG 4L60 trans the car dies out at 70 mph gears too tall tires to short looking for a good in between setup love highway driving just high revs at 75-80 mph so its pretty much local cruising for me, oh and it sucks up the gas on the highway thanks in advance for all the help