The Most Powerful Small Block Mopar..??

moper said

What exactly does the rule book say in regard to block types? "Factory deck height" isn't a big restriction...

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The block can be 'aftermarket', but it has to be small block, and have a maximum deck height of 9.560'. The maximum displacement is 420cid..!! Can be block with 59º or 48º degree tappet, 4 bolt main cap...!!