I think you should do some research about these big cube strokers. Many people seem happy with these low-revving, torquey small blocks, but others want extra cubes without sacrificing their rod length/stroke ratio. Before Andy Dunn gets on here with all his wit and wisdom as it relates to not only CHP's 427 but why he also subsequently chose a smaller displacement motor, have a read of this relevant page of his massively entertaining website
http://www.cobralads.com/butcher39.html