We’re not exactly sure how you’d hide this purchase from the wife! Check out this custom-built rock crawler that started its life as a ’97 Jeep Wrangler. The seller claims that there 1,000+ hours of shop time invested and he has receipts totally over $40K. Under the hood you’ll find a 8.1L Vortec engine paired with a Turbo400 HD transmission. The TJ also 2 1/2 ton Rockwell steering axles, four-wheel steering, Detroit lockers and locking hubs. The Jeep rolls on 49″ Super Swamper iRok tires and has a laundry list of other upgrades including onboard air and a detachable eco-cage. Current bidding is at just over $16k with 3 days left on the auction. The reserve price has not yet been met. Check out the listing for more details.