lo po cam dilemma

I think I'm missing something here....with 2.76s, and an automatic;
-In first, you are geared for 12mph per 1000 rpm. So 2500=30mph,and 3500=42, and 4500=54, and 5500=66.
-In second you are geared for 20 per 1000 rpm. So 2500 =50, and 3500 = 70, and 4500=91
-In Drive you are geared for 29 per 1000;so 2500 Would be 72.5mph

What speeds will you be typically driving at, when you need torque?, and what will your rpm be?
If you answer 30 mph in Drive; Well, first the tranny will have to downshift, and if the governor allows first, your tach might hit about 2500; Got Torque? Got all 4bbls? A big cam will not help you; the bigger the cam, the worse it will be.
But if you answer 60mph in Drive; Well it's hardly likely the gov. will allow first so in second, your Revs will be about 3000 rpm; Got torque? Got all 4bbls?
But if you answer 45mph in drive; well the downshift into second will put you around 2500; Got torque? Got all 4 bbls? But suppose it shifts all the way down into first, giving you 3750 rpms. Got anything there? Well, actually you do. But in about one or two seconds you will be speeding, and almost out of revs.
So, where are you gonna cam that beast; for horsepower at 5000Plus,or for torque from idle to 3000?