http://www.network54.com/Forum/74182/
The whole site is devoted to FE motors. I'm not that familiar with Marine engine specs other than one may be reverse rotation. Now several companies, Shelby, Pond and Genesis make aftermarket 427 blocks but they range from $3 to 5k. Good usable 427 blocks are worth some $$ by themselves. If they are sideoilers then the blocks could be worth $3k each.