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post #5 of (permalink) Old Jul 3rd, 06, 5:37 PM
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Re: Ls5 454 ?

The 512 was available as a 2 or 4 bolt main block in 70 and 71. The CRQ suffix code on the pad indicates it is an LS-5 360 HP with a Turbo 400 trans. this motor was a 2 bolt block. The 4 bolt main blocks were used for the LS-6 motor in 1970 and the 454 425HP motors used in Chevelles Corvettes and Monte Carlos in 71.
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