Walking around a 383-inch LS built from a 5.3L Vortec iron block and LS stroker kit With the right parts it's easy to turn a 5.3L Vortec block into a 383-inch 540 hp LS-swap mill. Related Videos ...

We start with a very common, 440-horsepower, 383ci stroker engine using production Chevy Vortec iron cylinder heads and swap them out for a set of CNC-ported aluminum heads. Naturally, they make ...