In the 1980s General Motors shifted away from small holes in the cylinder head and pushrod guide plates instead to what they refer to as “guided” rocker arms. These stamped rocker arms use two small ...

Honest-to-goodness aluminum heads for the small-block Chevy? For years you've probably heard rumors about these mysterious super-trick heads. You may even have seen some of the very rare aluminum ...

Ford produced good small-block heads for a few years (1963-66) before altering them to meet emissions requirements. Most of these changes occurred in the exhaust ports, thus performance suffered.

We're used to the unexpected from World Products--things like 454-cube small-blocks and big-blocks with cylinders large enough to warrant their own ZIP codes. But this is something altogether new and ...