when you get to it, consider the TKO over the GV. my TKO has a 5th gear OD of .64, much lower than the OD in the GV. with a 28" tire, and 3.21s, I was idling down the freeway, doing 75mph at 1800 rpm. Not good for me because the speed limit is 65, and if I drove that slow, my RPMs were low enough that the motor was getting choppy, lumpy, surging, etc. on the cam, since the cam I have doesn't really smooth out till 1800 rpm.

Off the highway, where speed limits are 55mph? forget about trying to use 5th gear!

so, I went "extreme" and put some 4.56s in the rear end. I haven't driven it yet, but the math says that I can do 65mph at 2200 RPM in 5th gear, or 75mph at 2600 RPM.


hmm...4.56s for hard launches, and still turn less around 2500 rpm while cruising down the highway