will a dccd diff from a 5spd box fit a 6spd box
 

as above i'd like to upgrade my 5spd box to a 6 spd box but keep the dccd, is it possible to bolt up the 5 spd dccd unit to the 6 spd box??

No, it won't fit, the box is totally different.

Phil

As above , it won't fit, but your controller will work with a 6 speed DCCD