And it's pretty clear why many think LS engines are so special. They're powerful, durable, reliable, easy to service, and ...

A perfectly restored example with a numbers-matching V8, this holy-grail 1970 El Camino SS 454 LS6 could fetch over $250,000.

The original specs for a bone-stock 454 LS6 indicated 11.25:1 compression; the mechanic had the rectangular-ports heads milled down, per his customer’s request (the engine was sent to Nick’s ...