To A 5-liter owner, getting a set of aluminum heads is like hitting the lottery. The factory chunks of cast iron don't flow diddly, and that's a big problem if you're trying to make horsepower.

GM's Gen III V-8 ain't your old man's small-block Chevy, and maybe that's not such a bad thing after all. For everything the original Bow Tie Mouse accomplished since its 1955 inception-from weaning ...

The reason behind the loyalty to a particular port shape is the marketing employed for years by both Chevrolet and the aftermarket. From the very beginning, performance big-blocks like the L72, L88, ...

So far, we only have about 1,600 bucks into our 406 short-block, including assembly and a bit of farmed-out labor (see July and Aug. '06). To complete the job, we started looking around for cylinder ...