BBC is an acronym for Big Block Chevy. Although there are a few other acronyms that are also BBC, in the automotive and marine world BBC is Big Block Chevy. Big block chevys were sold with cubic inches from around 400 to a little over 500. This is the bigger version of the popular SBC or Small block Chevy which range from about 250 to 383 cubic inches. One essay way to tell if you are looking at a small or big block is to look at the exhaust ports. A big block has evenly spaced exhaust ports while the small block has the middle two almost touching.
