A modern mechanical cam and springs requires what work on the heads?

What do you think about this one? it's pretty close to the one they we're running in the 275 hp commando d-dart's.
COMP Cams Magnum Solid Camshafts 20-247-4, Duration 282/282, Lift .495/.495
http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=666&sb=2

And i should be safe with retainer-valve guide clearance.