The heading of this post states 425hp & Z-16. That was what prompted my comment, merely meant to be a minor correction rather than the beginning of an argument.
According to Chevy's production figures there were only 201 396cid engines installed in production '65 model year Chevelles, and we all know they were rated at 375hp. Show me some proof that any Chevelle got a 425hp engine.
Two 396 engines entered production for '65 full sized passenger cars: The L-35 (325hp) with a total production of 55,454 and the L-78 (425hp) with a total production of 1,838 compared to Corvette production of 2,157.
Actually, there wasn't even an RPO# assigned to the 396 engine used in the Chevelle. Z-16 was an entire option package that included that engine, along with many other components, similar to the Z-06 or Z-11 ('63) packages.
Verne
