How do you tell a 305 from a 305 HO?

The primary way to distinguish a 305 from a 305 HO (High Output) engine is by checking the engine code and specifications. The 305 HO typically features higher compression, different camshaft profiles, and upgraded components that enhance performance. Additionally, the HO version often has a distinctive intake manifold and may be equipped with a more aggressive exhaust system. Checking for these characteristics, along with any factory documentation, can help confirm the engine type.