A little more about roof racks...
I designed the LJ Safari Cab to easily accept the roof rack from an XJ Cherokee, although other racks can be made to fit without too much trouble. The integrated rack mounts in the hardtop are positioned where the XJ rack will need them to transfer loads from the rack to the sport bars.
I chose the XJ rack for that hardtop design for three reasons:
1. There were millions of XJ's made, most with roof racks, so they're plentiful and inexpensive in most junkyards ($15 in my local u-pull).
2. They look right on a Jeep because they are from a Jeep. Nobody's ever asked me "is that a Ford Explorer roof rack on your Jeep?"
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3. Because millions were made, there's terrific aftermarket support for things to mount to the XJ racks.
For example, the light-duty XJ crossbars aren't adequate for supporting a roof-top tent. When I mount the tent on mine, I use Surco XJ rack channel adapters mounted to the crossbars that came with the RTT. Plenty strong enough, and tall enough so the XJ crossbars don't have to be removed when the Surco brackets + RTT is in place:
Included in the aftermarket support for the XJ rack are plenty of accessory solutions, such as kayak carriers, bicycle carriers and rack baskets, although the basket I use is made from two Harbor Freight receiver racks and cost me about $75 to assemble:
I haven't decided exactly which rack I plan to support on the JK Safari Cab, but unless I find a good reason not to, I may go with the XJ rack again.