Edit: As Red pointed out there are lockup and non-lockup transmissions and you need to identify what you have so you get the right converter. You can tell lockup from non-lockup by what the input shaft looks like. If about 1/2" of the front end of the input shaft is machined down smooth it's a lockup. If it has splines all the way to the end it's a non-lockup. Here's a picture showing them. The top one is a lockup and the lower one is non-lockup