Cams How do you choose one?

from above
,if I did increase the exhaust it would severely hurt torque,
, cuz it could sacrifice too much fuel economy if you advance it too far.
The downside is you lose that same 4* on the powerstroke, and so the fuel mileage may suffer.

pitfalls to advancing the cam-
like trying to make a stock 360 cam work in a 273, or a 340 cam work in a low compression motor
more heat in the exhaust also
same with spreading the lobe centers out, decreasing overlap but closing intake later and opening exhaust earlier
that's why you have to watch both your intake and exhaust duration and your lobe centers at the same time
another reason to use a shorter duration cam is that you can have dynamic compression AND a full power stroke
remember DC and Racer Brown use .008 for advertised (DC almost) and Crane uses.004