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Vortec Engine and Cylinder Heads are the most common components of GMC automobile engines. The Vortec heads are based on the same basic design as the original GM 2-valve, pushrod 350 V8 (Vortec engine) cylinder head but with an improved internal valvetrain.
Vortec Engine and Cylinder Heads are the most common components of GMC automobile engines. The Vortec heads are based on the same basic design as the original GM 2-valve, pushrod 350 V8 (Vortec engine) cylinder head but with an improved internal valvetrain.
Source: https://www.alliedmotorparts.com/blogs/news/vortec-engine-history-and-cylinder-heads
