Converting Open drive box to Closed....?

I'm just wondering if any one has converted an open drive gearbox to closed, and has pics handy, if there's another thread talkin about this sorry,

I'm running a 36 diff in a bucket, but want a later gear box.

Cheers in advance

Outback

 

The 1956? Hot Rod Annual has an article on what a cad lasalle box looks like I will photo copy it if you like Roger

 

Cheers, that'd be good.

Outback