![RPO Z11: CHEVY 427 LIGHT HEAVYWEIGHT](http://carguychronicles.com/wp-content/uploads/2022/05/Chevy-Z11-3-1-150x150.jpeg)
By checking off RPO Z11 on a 1963 Chevrolet new car order form, you could buy a factory-built racecar. Only 57 people made that choice before GM pulled the plug. Hemmings’ Mike McNessor writes about the rare RPO Z11: CHEVY 427 LIGHT HEAVYWEIGHT.
She’s so fine my… 427? Clearly not 1960s radio gold. But among Chevrolet W-engine enthusiasts, more poetic words were never written. The 427-cubic-inch Mark I big block was part of the factory-lightweight 1963 Z-11 package built to win rounds in quarter...
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