For Hennessey Performance Engineering faithful that couldn’t swallow the idea of owning a Ford-based Velociraptor, the Goliath 6×6 has arrived. It’s based on the 2019 Chevrolet Silverado 1500, and like the F-150 based pickup, it’s powerful, off-road ready, and utterly bonkers. Hennessey revealed the Goliath 6×6 on Tuesday and said the package…