lock up transmissions

I rebuilt an 84 diplomat tranny and ran it in a 318 mild Duster. It had the low gear set, 5 disc up front and hyd lockup control. You can plug the orifice to eliminate lockup, install a stiffer spring to raise mph engagement, or have a converter built without the clutch. Worked great, the 318 was stock.
It's hard to find anyone using one. Most opinions are get a non lockup. I'm going to run this same tranny behind the 340 Dart I am putting together with what I have in my garage.