Edelbrock Crate Engine LS3 Long Block OnlyEdelbrock part #46720 is the same long block used on our E Force LS Supercharged crate engine that delivers 720 horsepower and 695 ft lbs. of torque on 91 octane pump gas. It features an aluminum LS3 block with a forged and balanced Manley crankshaft, forged Manley h Beam connecting rods and Manley forged aluminum pistons to create a 416ci LS3 stroker with 4. 065" bore and 4 stroke. Its compact design allows for a seamless swap into most platforms;