Late to the party, but as Beebe said, the 1975 and up 400 blocks are less desirable when it comes to performance builds.
Given that you said it's got a forged crank, it makes me wonder if it's a stroker crank. If so, that engine could be anywhere between a 428 and a 467, esp. with a 0.060 overbore.
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- Peter -- 66 Le Mans - 93 LX 5.0 --
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