[FFR428]

Robert Pond makes a nice aluminum 427 block. Shelby as well but it's a little more. Genesis did make a few aluminum blocks but their gig has been mostly iron blocks. Buy one from a good vendor like Keith Craft, George Anderson, Barry Rabotnick and the likes. They sort the good from the bad and fix the quirks these blocks all have. It would be wise to buy pistons and rotating assy from them so everything can be fit and blueprinted/balanced for assy if you still need all those items. JMO.