in September 1970, GM introduced the 2300cc Vega engine with OverHead Cam! It wasn't the first OHC from GM, but the first OHC with light alloy block. It produced 110hp and 138 lb-ft torque. Once again GM had outdone the imports and millions of buyers lined up (more than 2 million sold in the next eight years)




It had a sleeveless aluminum block and was diecast. Molten aluminum was transported from Reynolds and Alcoa reduction plants to the New York foundry, inside thermos tank trucks




With a finished weight of 16 kg, the block weighed 23 kg less than the cast-iron block in the Chevy II 2.5 four-cylinder. However since it was fitted with a cast iron cylinder head, the completed engine was not a lightweight