If it is an LS6 crate motor it will have an XAA suffix stamped on the pad above the timing cover, a real one would have 512 stamped on the block. Also you would need to find out what heads it has on it and intake. I'm no expert on this subject. A lot of 454 motors claimed to be built to the specs of the LS6. You would need more info about the motor to be sure.
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Ray
1970 SS Chevelle Van Nuys Built
Last edited by shadowgray396; 06-30-2012 at 12:47 AM.
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