The Power Adder SBC Short Block is built to handle serious power from turbochargers, blowers, or nitrous—perfect for your next forced induction build. For supercharged applications, we highly recommend the dual 3/16" keyway crank option. The ATI Blower Balancer features both SBC and Chrysler bolt patterns with a thick BBC hub, requiring a matching ATI timing cover and BBC seal. Compression ratios are calculated using 65cc cylinder heads. Available Configurations: Engine ...

Power up your LS7 build with this 427" Aluminum Short Block, crafted for racers and street enthusiasts chasing massive power! Designed as a direct replacement for OEM dry-sump LS7 short blocks, this beast is built for precision and durability. Whether you’re dominating the drag strip or cruising with serious torque, it’s rated for up to 1700hp and pairs perfectly with turbo, supercharged, or naturally aspirated setups. We’ve optimized it for LS7 platforms, with bore sizes matching 4.125" bloc...

Launch your LS7 build into overdrive with this 441" Short Block, engineered for street/strip dominance and big-torque thrills! Perfect for LS7 enthusiasts chasing 1000-1500hp, this short block is a powerhouse for street cruisers or weekend drag racers. Built for 4.125" bore LS7 blocks, it’s ready for turbo, supercharged, or naturally aspirated setups, delivering smooth power with pre-installed camshaft and sealed-up kits. Need help picking heads or tuning? Call 210-446-0960 to dial in your dr...

Kick your LS7 build into high gear with this 427" Short Block, crafted for everything from street/strip cruisers to drag strip beasts! Available in two setups—1300hp for versatile performance or 1700hp for max power—this short block is your foundation for LS7 engines with a 4.125" bore. Whether you’re boosting a daily driver or chasing low ETs, it’s built to deliver, with pre-installed camshaft and sealed-up kits for easy integration. Call 210-446-0960 to pick the perfect heads and tune for y...

Fire up your LS build with this 441" Short Block, your go-to for turbocharged street rockets and drag strip champs! Designed for LS platforms like LS3 or LSX with a 4.125" bore, it’s built to handle 1000-1400hp with ease, perfect for single-turbo street cars or moderate drag setups. This short block comes loaded with a pre-installed camshaft kit, sealed-up components, and a turbo-ready oil pan for boost-hungry builds. Want to nail the perfect setup? Call 210-446-0960 for head and tuning advic...

Build serious power with this 427" LS Short Block, available in three performance configurations to match your horsepower goals. Assembled with tight tolerances and premium components, each package is tailored for street, strip, or full drag duty. Choose your desired output and piston volume, and let this short block become the foundation of your LS performance build. Need help picking the right cam? Call 210-446-0960 for expert recommendations! Explore the components in each configuration: ...