Chevy’s immortal Small-Block V-8
It was simple and brilliant all at once — a new V-8 engine with walls so thin it was lighter than the straight-six it replaced, despite two additional cylinders. The new engine had an oversquare bore-to-stroke ratio, meaning its 3.67-inch bore was larger than its 3.00-inch stroke. Its stamped steel rocker arms were mounted on spherical pivots, and its hydraulic lifters metered plenty of oil to the cylinder heads via hollow pushrods. Its pistons were ultra-light and its cylinder heads were interchangeable with wedge-type chambers. It could rev high and was incredibly reliable.
This is a companion discussion topic for the original entry at https://www.hagerty.com/articles-videos/articles/2015/02/06/america-engine