torque converter/stall, help

Thanks pettybludart.

I searched the forums and read about how important the converter is. I was not expecting to pay much more than $3-400 bucks, but that doesn't seem to be the case.

Add to the list if you know of anymore info that I need:
Rear wheel/tire size-18", 145 50 R18
Internally ballanced
Cam lift INTAKE .544 EXH .565
Duration @ .050 INT 244 @ .050 EXH 252
Cam degree 106
3.55 gears with power lok
Use, 99% street with the occasional weekend at the strip
complete electronic ignition from FBO

One last question, what differentiates a good custom built converter to an off the shelf part?

A custom built unit is BUILT FOR YOUR APPLICATION, not a generiac fits most applications.