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Interesting piece of work Army.
It doesnt look quite right though.
You will see the sides of the lobe look as though they are approaching being slightly concave. There should be slightly more metal in those regions. The cam that you have drawn would be prone to valve bounce.
I have no idea where you would get the original spec on the cam.
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Thanks for the response it is a bit rough - I know - I based my drawing on two circles and two tangential lines... the tangential lines start and stop at the same height but their positions are done by eye. So I know it isn't accurate enough.
If I still had the kit I'd use a finely pulsed tachometer and a LVDT to make a time capture measurement of the cam's surface at very slow rotations. But I don't work at a university anymore...