It seems everyone these days wants to build their own Tumbler. This Tumbler is built by Australian native Grant Hodgson and features a big block Chevy 454 cubic inch motor with a small splash of nitrous for good measure. The base engine puts out 560 horsepower. No telling what the engine can do with a shot of nitrous. Something tells me this is not the last Tumbler we’ll see. Check Jalopnik site for video.