427ci Dart LS Next2 Aluminum LS for Big Boost Someone ordered this unicorn block from Dart a couple of years ago. When finally produced, they didn’t send in their cash, so we scooped it up. The LS Next2 upgrades from Dart are ½ inch head and main studs which are great for handling heavy boost. This build has a COMP hydraulic roller cam and Cometic MLX lifters but will still handle 2,000 hp. The rotating assembly features a Callies Magnum crank and Ultra Enforcer rods with BRE custom Diamond pist