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.

As noted in our recent "unleaded gas" series, one way to lower compression and make your motor compatible with today's gasolines is via a swap to later-model heads. From time to time as space permits ...

I worked as a machinist in an automotive machine shop in the early 1980s before my career took me into the aerospace sector. The shop's high volume of mundane engine rebuilds and turning brake drums ...