Isn't that a Chevy cam? Comp Cams XE256H :)
This one serves my 351w well
Comp 35-349-8/XE264HR
Advertised Duration (Int/Exh): 264/270
Duration @ .050 (Int/Exh): 212/218
Gross Valve Lift (Int/Exh): .512/.512
LSA/ICL:114/110
RPM Range: 1,500-5,500
That said, your engine combo is different than...