Camshaft identification help

I was able to track down the former owner of the engine, and he said all he can remember is that the cam has .455" lift and is a "purple shaft" cam. Thanks for the help FABO. I will probably go a bit larger since I have Edelbrock heads, Performer RPM manifold, headers, MSD, 9.5 to 1 compression, automatic and 3.55 gearing, a combo that the former owner didn't have. Gentlemen, start your opinions!