converter question

im in the process of doing some mods to my turbo t. so far i have purchased:
precision pt70
houston dp
60# injectors tt chip
340 walbro

im trying to decide between 2 converters. vigilante 3400 l/u or a art carr 3400 n/l/u. the car is street driven and ran at the track on weekends. any help would be appreciated. thanks
PTC non lock converter from twisted 6 racing is what you want.. especially with that turbo. Search for PTC and read up on 'em.