Torque Converter Question

Several Questions:

I have been to howstuffworks.com and I understand generally how a torque converter works. I hear people saying they increased their torque on their car(auto tranny's) by getting a 3500 torque converter. I really need more torque off the line and was wondering if this was a viable option.

What I need to know:

What is different with these aftermarket torque converters(more aggresive turbine blade angle maybe??)

What(if any), are the drawbacks to installing an aftermarket torque converter(will it shorten the life of any other component, namely the motor and tranny)?

How much is torque actually increased?

If you have any answers to any or all of my questions I would really appreciate some help.

Thanks

The rpm that you've mentioned is called the stall speed. Torque convertors with higher stall speeds are smaller in diameter than the original, lower stall speed torque convertor.