Posted 06 June 2008 - 04:02 PM
Rocky, the only dealer-available 318 engine in 1957 was the Polysphere 318.
It had either one or two four barrel carbs. dual point distributer, and a nice lumpy solid-lifter cam. The Polysphere engine's heads are close to being a hemi in valve configuration and spark plug location, but didn't have the same valve geometry.
The real hemi's have two rocker shafts to operate the valves and a more central location for the spark plugs.
The "Poly" engines did offer a lot of the same breathing characteristics as the hemi, but were not as complex to manufacture, and did not put out as much horsepower.
There IS talk of a f/x 318 Hemi that was in a few '57 Sport Fury models, but the last one that surfaced went for over $350,000 at auction, so I hope you didn't have one of those.
Mike Balash
Tattooed slotfreak
It's better to be at the Devil's right hand than in his path.