OK, I found the seal drawings on the Model Engineer website.

Attached are some rough sketches (inlet only, right hand sketch). First, because Uncle Ed. did not have the benefit of CAD, his dimensions do not quite work. The combination of 11/32" base, 9/16" flank radius, 1/32" fillet and 5/64" lift do not give a smooth curve. In my sketch, I have used the radii as given: with everything properly tangential, it results in 0.004" less lift. If the lift is critical, you will have to alter one or other of the dimensions.

The cam is symmetrical and only composed of circular arcs. For 240 degrees of its circumference, it is a circle (constant radius) so that bit is easy.

To calculate the Z-dimensions as above posts, the left and centre sketches may help. Start with the centre one. For any angle a [from 0 to 20.4 degrees], measured from the start of the flank radius, you use the cosine rule to calculate x, the distance from the centre of the cam. You also need to calculate the angle from the cam centre at which that distance applies (I did not show that as the sketches are too messy as they are).

Similarly (now use the left sketch), you can calculate y, the distance from cam centre when traversing the fillet radius. Cosine rule again, using angle b [from 0 to 39.5 degrees]. Again, calculate angle from cam centre at which that distance applies.

Now, the most important bit: you will not be able to cut the flank and fillets using a flat-bottomed cutter as the edge of it will dig in where you do not want it. You need to use a ball-ended cutter and then it is always tangential to the cam profile.