Another torque converter question

Thanks, I've been reading threads on this site and others, and now I'm worried that it may be a lock up tranny. Like I said, it is titled as a 79, so I am assuming the tranny is a 79 and I read they started using lock ups in some 727's in 78. In my haste to get it to the tranny shop before they closed on Friday, I didn't take down any numbers thinking that I was safe because 727's were never lock ups. I have to get in touch with them before I make any moves with a converter.