The advertised info for the Crane #529551 cam is:
Advertised Duration = 286°/294°
Duration at 0.050" = 224°/232°
Advertised (Theoretical) Valve Lift = 0.586”/0.609”
Lobe Separation Angle = 112°
Overlap based on advertised duration = 66°
Overlap at 0.050” = 4°
However, Crane rates the advertised duration based on 0.004" tappet lift. If it were based on 0.006" tappet lift, which is what many cam grinders use, the advertised duration would be approximately 276°/284°. Now the cam doesn't look so big does it.
Those advertised duration numbers are more in keeping with the duration at 0.050 numbers. Overlap is actually about 56° rather than 66°, which is great.I think this is a great cam. Two things need to be mentioned:
First: with 224° intake duration your Pantera's engine will tend to make peak horsepower at approximately 5500 rpm. If that's not a problem for you, its not a problem for me.
Second: Crane rates the "max lift" points of the camshaft at 107° intake, and 117° exhaust. Those are not the lobe centerlines. The lobes are asymmetric and therefore the max. lift points of the camshaft occur 4° before the centerlines. The camshaft's centerlines are actually 111° ATDC (intake) and 113° BTDC (exhaust).
To get the valves to "open and close" where I would like to see them, I would advance the camshaft timing by 2° ... i.e. intake centerline of 109° ATDC. That would place the "max lift" point of the intake valve at 105° ATDC.