[57taskforce]

Fwiw My 2010 Camaro SS has the LS3’s nearly identical twin L99, same basic engine just afm and vvt added. It runs about 2K at 60-65, when driven right I can get closer to 25mpg on long interstate trips.when I took it to Vegas a few weeks ago I averaged 23 on the way there with lots of “spirited” romps passing cars on the 2 lane roads I take on that trip while averaging about 80 mph. It pulls pretty hard for a mostly stock car. One of the more popular mods for the Camaro Guys is 3:91 gears however, obviously they pull quite a bit harder with more gear. I wouldn’t hesitate to run it 2K@60. Your 275/40/20 tires are the exact size the SS Camaros run, and the automatic cars have a 3:27 rear gear. The 4l70 won’t have the double overdrive that my 6L80 has but at .70 OD for the 4L70 and .67 final Od in the 6L80 they should be pretty close. 3rd gear in the 4l70 @ 1:1 should wake it right up and should pull pretty hard when you want too. You’ll enjoy 3:73’s I believe.