Anyone ever run this Purple shaft?

Yea it is a circle track cam, 1/4 mile flat track (flat turns)
For what I was using it for, it worked well. Here where I live (Long Island) it was useful on the hwy.'s. the island is wedged shape from the sea level south shore to the lightly billed north shore that gets to about 350 feet or so at max. Traffic/roadways are generally grid north to south. Hwy exit ramps are barely bank if at all.

Once your at speed in the power band running the course, it was excellent having great torque out of the roads bends and exits/entrances. It did t padticuly have a high rpm top end charge. Works well in a 4spd manual car. Frequent Gear changes needed to stay where you needed to be.
Easy 400+ HP out of this cam with iron heads. Great for road race short tracks.

I agree with Skrewz and the above mention on valve springs but also wonder if you degrees the cam in. The RPM ceiling seems a little bit low. Perhaps it is off a 2 degrees?