About the time you start reaching into cams and intakes with a powerband of 2500 rpm and up you need to start thinking of a tc if you are not reaching for highway unfriendly gears.
The original concept behind high stall tcs was to make up for lazy gearing and/or heavy vehicles by not only raising the stall speed but increasing the amount of torque multiplicaion in the fluid drive.
I assume everyone knows theres a trade off...higher heat, and a bit of a "dyna flow effect" at least in non lock up vehicles.
Lastly...and unless tc designs changed a bunch...a tc is not a be all end all. You can over cam them and you'll need more gear.
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