This box is identical to the one that I recently fitted to Bumble. Be aware that you will need to cut your existing mounting to make it fit. Also, note that this box has ten splines rather than the usual Commer multi splined end. Not only will you need to get your prop shortened but you may need to source a new prop end as well.
If you need any advice on fitting, I will be happy to help.
Jim, Nols and
Bumble