what Torque converter?

Hey everyone, after reading a couple threads on converters i think this is going to be the next thing to put in the Dart due to my dilemma. I do a lot of freeway driving, its a must necessity for me. I have a set of 3.23's that are ready to go in beacause 65mph at 3000rpm with my 3.55's is just too much since i do a lot of freeway driving. So i know putting in the 3.23's are going to hurt launching but from what i hear or think i hear, Dynamic's converters are supposed to be the way to go. i have read a couple posts and it seems that these converters only put the full rated stall when your at WOT and while your cruising it acts as a lower stall converter? Did i read something wrong or do all torque converters like from B&M and TCI do this? please enlighten me i just dont want to buy into something which is going to be way too much for a daily street car.

Thanks