Gear selection

[1987MCSSAeroCou]

Ok, that's what I figured. So my final gear with 4.56s would be 3.05, as opposed to the 3.42 in 3rd of 3.42. So to run at 140MPh w/3.42 I would have to shift into 4th or run to higher RPM, so that might not be the best gear choice as the 3-4 shift would be close to the end of the 1/4 (with enough power of course).