Build sheet says 440 .030 over. cam .585 lift, 440 source aluminum heads. All new pistons, rockers and hardware. Edelbrock intake and holley carbs. MSD ignition, built 727 trans and 4:10 dana 60 rear. It runs pretty good on pump gas, but I have not raced the car yet. I was a fresh build before I purchased the car with minimal drive time. It does like sucking gas.