My 06 Tahoe 4wd has a stock 5.3 with a nelson tune,and I want to change the gear ratio. I have 35-12.50 /22 tires.At 60 mph my rpm is at 1450, it has the stock 3.42 gears now and I was thinking about 4.56 or 4.88s.The 4.56 gear will be at 1850 rpm at 60, while the 4.88 will be at 1920 rpms.

Any suggestions?