[FFR427]

The block is usually the only part of value on the marine 427s. Many of the marine 427s didn't have the forged crank and the heads are more than likely a "J" casting (ie C5JE) which both the heads and crank are equivalent to CJ parts but without the casting numbers. The front timing cover is probably cast iron and weighs a bunch. Also, be careful on some of the large Chris Craft boats that had 2 427s because one of the motors was typically reverse rotation. I learned the hard way on one of these motors.