Here’s a neat piece of CJ6-specific Jeep history.  This adapter kit is what a CJ6 owner would need to install to run a Meyer half-cab.  It fills in the where the top is normally “notched” for the wheelhouses on a CJ5.

I suppose you could use this on a full CJ5 hardtop for a neat CJ6 extended cab / shorty pickup.

The kit is currently for sale on eBay.