No, not "off the shelf".
Having an engine that performs the way you want it to perform is more important that how much horsepower it makes ... unless you are racing the car competitively. If you were racing competitively you would not accept the limitations of shipping costs, local availability, etc. Believe me, the 351 Cleveland with 4V heads is a bad-ass engine. It accelerates like few engines do. Its not hard to put together a 351c that will perform unbelievably. All these questions aren't necessary. Just follow sticky #3
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