6.9
1966 Pontiac 421 Engine: Specs, Configuration, and Maintenance
1966 Pontiac 421 Engine Specs Engine Configuration The 1966 Pontiac 421 engine was a powerful V8 engine that offered impressive performance for its time. Let’s take a closer look at its specifications and configuration. – Displacement: The engine had a displacement of 421 cubic inches, which is equivalent to 6.9 Read more…