A Little Help. 1980s Truck 727 in an A Body?

In the mid to late 80's the 1 ton D 350's didn't come with lock up .Maybe Dodge didn't think they would hold up at the time. My 88 D 350 doesn't have it.Another little bit of info...The 79 Chrysler 300 was the last performance "B" body with the high output E-58 360,, it too didn't have a locking converter 727.