I remember Dwayne's combo but the roller cam pushes the budget up almost a grand. The SR's might be a good trade for the EZ heads depending on your header situation.

My thinking is that since the 4.250/2.200 crank, 6.800 rod and the Diamond piston are all shelf stock items, this is a pretty easy combo to build. I don't think it costs anymore to build one of these 505 shortblocks than it would to build a 451 with a new crank.