Originally, the HEI system was fitted with a four-pin module. By 1978, it had a five-pin unit. Seven and eight-pin modules were more a computer-controlled element that came around in the 1980s.

Running through a brief refresher course, it's important to note that an HEI setup replaces the traditional points and condenser setup with a control module. This module is able to deliver much ...

We put a Chevy small-block to the test on the dyno to see if a distributor really can make power in street stock racing classes, as well as if thinner synthetic oil can make more power as well ...