Anyone ever run this Purple shaft?

Rumble, Now that you mention it, I had installed the cam with a 2* advance key on the chain sprocket. It was all I could find when I built the motor. I forgot all about that... As far as the valve springs go, they are new and were set-up by the machine shop. He told me that they were a littly stiffer than what the cam card called for, but was good B/C I would not have to worry about valve float. If I recall it was somewhere around @20# stiffer at installed height +/- 5#.
Guess I should change cam key