Race Jeeps are good with six-cylinder Jeep engines and great with healthy V-8s. Greg Parker and his team stuffed a 420ci Chevy small-block under the hood with ACCEL EFI putting out 600 hp. The engine feeds a built TH400 automatic and an Atlas transfer case. The engine cage supports the front Fox Racing shocks. The cool perforated metal wheelwells protect the engine from gravel flying off the tires but also help cool the healthy powerplant.