Chevrolet bills its least powerful 502 crate engine, the HT502 available in long block form, as an alternative to rebuilding the big block in pre-1978 pickup trucks. With 406 horsepower at 4,200 ...

406 inch small block Chevy Roots Dyno Originally developed for industrial use, the 6-71 blower has become a hot-rodding icon. We delve into the details and test one on a 406-inch Chevy small-block.