Supersized fries and 32-ounce sodas seem to sum up society’s obsession with going big. Given this, it’s no wonder that engines, especially GM’s LS variants, have been creeping up in displacement.

GM's LS engine is a powerhouse, thanks to great-flowing heads that enable tremendous horsepower and high-rpm performance. But while the LS is becoming a more popular swap choice for earlier, pre-C5 ...