Whos running a 5.9L Magnum ?

If your running that bad boy on stock diameter tires, I agree and that FI helps a good bit.

I’d like to hear you say one day that you installed 3.90-4.10 gears with a decent tire size and let her rip!
3.90-4.10 are in the future along with an overdrive. I just can't justify doing it soon. My daughter is heading off to college. I have to pay for that first. I also have to get rid of the 8 1/4 rear end. I'll probably end up with an 8.8 out of the wrecking yard. 8 3/4s are just to expensive.