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Originally Posted by xracerbob
Pond block weighs less, costs less, has period correct casting # for those states that require it for ease of registration.
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Not that much less. I think the shelby block has an old casting date as well.
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Originally Posted by xracerbob
Downside is that it can only go up to 496 c.i. vs. 500+ for the Shelby, along with the Shelby name. .
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At those displacements, HP is limited by head flow, and I donlt think 20-30 ci will make that much difference.
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Originally Posted by xracerbob
The oiling system is different as well, but for street use, I don't think it really makes much difference.
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Unless you throw a rod through the side of the block, like I did. Shelby block doesn't have gallery in skirt of block