Compared to the old, stock Gen I/LT1/LT4 small-block valvetrains, the LS engines are head and shoulders above their ancestors when it comes to factory equipment. Where the old engines (except the LT4) ...

If the LS1/LS2/LS6 engine family has a shortcoming, it has to be the rocker arm mounting, which doesn't allow for adjustment. Non-adjustable rockers have become standard in virtually all late-model ...

Available to hot rodders at a very attractive price through GM Performance Parts' program, L92 heads bolt onto earlier LS-series engines with 4-inch (or larger) bores. But as of this writing (July '07 ...