This is a little custom of a Peackeepers Jeep.
I call it "MUDD"...well something between the M.U.T.T. M151 and and the mud all over it =))
A guy called: Airbrushler, from rcuniverse.com
Here is the link:World Peacekeepers 1/18
Made that custom, so I've tried the same.
All you need is some styrene or cardboard for side panels. Some good cuttnig instrument (exacto-knife won't be enough), 3 longer screw and 3 pen springs.
And some paint if you want look it smoother =)
All this stuff will give you a good clearence, more retro look and a working suspensions to your lovely used PTE jeep.
P.S.: More pics are in my album.
Here is the link: HissTank.com - G.I. Joe - HUNMARINE's Album: Jeep MuDD