Trash/Cut off the front factory Jeep frame rails you are currently using and build your own trailer tongue A frame trailer rails from the bottom of the Jeep uni-body frame rail structures just long enough forward for 90 degree jack knife of the trailer for easy trail maneuvering and for the least amount tongue weight. Suggest you "Finish" the fire wall by adding factory Jeep front fenders cut off about 6-8 inches from the doors to cover the side cowl and blend the fender ends into a firewall cap to finish the front of the body. Do not add anything at all (storage box) to your front fabricated trailer tongue rails as you now can put everything inside the Jeep. Remove the dash board as part of the firewall mod and finish appropriately always remembering the need to put most of your weight/cargo to the rear of the Jeep trailer given the axle location. Tint all the windows for security. If you are going to keep the factory Jeep rear-end add a "Surge Brake" controller to your front fabricated trailer tongue to provide trailer braking as this will be a HEAVY trailer. Add a parking brake handle to the finished trailer to activate the factory Jeep parking brake cables. Look at 2 jacks at the front corners of the trailer just under the front doors for trailer stability when parked camping or when unhooked rather than a single tongue jack.
I have seen some pretty slick setups with rear body sections for trailers particularly 1991 and older 2 door Blazers and square body Jeep Chrerokee's. The four door aspect of this trailer build will always make loading of this finished trailer a consideration due to potential tongue weight issues caused by the rear axle location. Adding some fabricated sheet-metal to your new fabricated front trailer rails to cover the firewall and extend down to possibly cover your new fabricated trailer A from tongue rails with slick design could also add an additional very neat aerodynamic look to the front of your new "Trailer"!
The options here are only limited by your fabrication skills!
A 2 Door square body Cherokee body section might be a better choice for a trailer conversion from a trailer tongue weight perspective.
Here is a pretty slick conversion using a Blazer Chalet camper with the front re-worked and mounted on a cut-off rear frame section of a Blazer. The Blazer Chalet shell was mounted on the Blazer rear from section just like it was when new. Given the fact that I have seen Blazer Chalet shells as cheap as $500 this is also a cheap way for a camper trailer build!
Also included are a couple of Jeep Cherokee trailer builds.
Pretty slick huh??
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