Here are the files for customizing your WWE Wrekkin Rampage Rig into the Porkchop Express as seen in the John Carpenter classic "Big Trouble in Little China". This is a bit more advanced than most things I put out there because it requires you to saw the Wrekkin Rig in half if you want to use the extended sleeper cab. Proceed at your own risk.
Some files, like the air filter and exhaust stack need to be mirrored.
I'll post some detail pics to help you out soon. Mine didn't exactly survive being shipped from GA back to Colorado unscathed so I have some repairs of my own to do.