How to identify Pontiac engine blocks


Pontiac blocks are interesting power plants that are often misunderstood and improperly identified by sellers and buyers alike. The blocks of all Pontiac V-8s from the 287 to the 455 are the same size and very close to the same weight, which can make it more difficult to identify the 11 different engine displacements produced from 1955–79. Adding to the confusion, multiple block codes were used, and date codes can overlap up to three decades.

This is a companion discussion topic for the original entry at https://www.hagerty.com/articles-videos/articles/2017/11/27/identify-pontiac-engine-blocks.