The Pluses we raced them great power --- the negatives -- they run hot - the load on the cylinder walls is greater than any other SBC ( reason ) all except the 400 uses a 5.7 length rod the 400 has a 5.56 length rod, every one we had cracked the # 6 cylinder wall -- they don't rpm in stock form -- and the 2 bolt blocks turned out to be stronger for us than the 4 bolt -- jz
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