A999 torque converter hub size

I have a late (1985?) 360 engine going in front of an A999 from a 1989 Fifth Avenue. The Fifth came with a 318.

I have read on here that the torque converter hub on 904/999 transmissions is smaller than 727s, and to my knowledge, Chrysler never used 904/999s behind 360s.

Is there a source for an adapter that will allow me to use the factory lockup 999 converter behind the 360? Changing to non lockup is out of the question right now, so I'm trying to work with what I've got. Thanks.