Justin Middleton showed up at Top Truck Challenge this year in his 1978 Chevy K5 Blazer ready to tackle the week long torture test in his competition orange K5 Blazer. Justin’s Blazer will be taking on Top Truck Challenge with what looks to be a failry simple set up. Upon closer inspection we realized that the unassuming competition orange Blazer is powered by a big healthy Rat. A 454 c.i. big block V8 that is! Check out the pictures bellow to see how Justin has prepared his rig to compete in Top Truck Challenge!