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The 400 block has been fitted with a 455 nodular cast iron crank that was cut down to 3-inch mains. An Oldsmobile thrust-bearing was employed with a shim. This short-block was originally built some years ago, before aftermarket cranks became widely available. If you decide to build a similar combo, an aftermarket crank is the way to go today. BME aluminum rods and SRP forged pistons round out the reciprocating assembly. The factory 2-bolt mains and stock caps are retained and the owner and builder of this engine-Kevin Swaney of TIP-says the bottom end will hold up, even with a possible 650 hp on tap.