Jason Johnson is on the relentless pursuit of making Wrecking Ball 2.0 the most powerful rig it can be…with a recently upgraded big block, powertrain and potentially even more in the pipe soon! The entertainment value of this truck at Louisiana Mudfest was over the top! Specs: 1990 GMC Sierra, 498 BBC, Powerglide trans with trans brake, FTI converter, Hater Kit hybrid axles, 18.4×30 tires.