If SORT copies the input attributes, will SORT override the attributes specified in the JCL?
Suggest you run a test on your system and see what happens.
I believe the output file will have the attributes specified in the jcl. I think i mis-spoke earlier - i forgot we were talking about SPACE and i believe that still needs to be specified (rather than DCB info which sort will use from the input dataset).
If you run a couple of tests, you will know for sure what will happen on your system (and we'd be interested to hear as well