For my 428, here's what I've got setup:
Crane PowerMax H-278-2 Hydraulic
2200-5200 basic RPM
3000-3400 cruise RPM
9.5-10.75 advised compression ratio
Cam Specs
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222/234 - Degrees Duration @ .050 Int./Exh.
278/290 - Degrees Advertised Duration Int./Exh.
114 - Degree Lobe Separation
548/580 Gross Lift Int./Exh.
http://www.cranecams.com/master/apps...#4.%20PowerMax