They used the factory kick down. They were more confident with it. I sent the cable back for a refund. I knew when I bought the car that I would go EFI so yeah....I didn't waste any time ;). Next up on the list of impovements is I orderd two resoniators to be installed to help with the dreaded "2000 rpm drone". After that, sometime this fall or winter, I'll swap out the tranny to a Tremec 5 speed and add a little sound deadening to the interior.